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Open Access Article
1 - The effect of polar copolymers in protein absorption on contact lenses on 2-Hydroxyethyl methacrylate(HEMA)
Mohammad Yari S.S Sharehjini Omid Moradi -
Open Access Article
2 - Zinc foliar application on alleviating effects of irrigation cut-off in grain filling stage of safflower genotypes (Carthamus tinctorius L.)
Jaivani Manoelian Weria Weisany Hamid Jabari Marjan DiyanatBackground and Aim: Climate change led to increasing the severity of stress, and today’s life of all plants is challenged by rapid environmental changes. Water is an important component in all physiological processes of the should be added, accounting for 80 to 95 MoreBackground and Aim: Climate change led to increasing the severity of stress, and today’s life of all plants is challenged by rapid environmental changes. Water is an important component in all physiological processes of the should be added, accounting for 80 to 95% of the plant’s biomass. Except in high humidity environments, plants are likely to be exposed to water deficit stress throughout their life cycle. water deficit stress decreases the quantity and quality of the plant product and in addition reduces the water use efficiency as well as reduced the absorption of nutrients. to reduce the effects of water deficit stress on plants, various methods are used, including mineral nutrition with trace elements such as zinc.Method: to investigate the effects of foliar application of zinc on the morph physiological and biochemical traits of safflower cultivars under drought stress, an experiment was conducted as a should be added split-plot based on of should be deleted randomized complete blocks design with three replicates during 2019-2020. Experimental factors include drought stress as the primary factor, and safflower cultivars and zinc foliar application as secondary factors. The plant’s canopy temperature was determined using an infrared thermometer. Seed oil was extracted from the mature seeds of safflower cultivars by the should be added apparatus using hexane solvent.Results: Water deficit stress was applied in two levels (regular irrigation (control) and irrigation cut-off when the grain filling stage begins); safflower cultivars in this experiment were Isfahan, Linas, Padideh, Parnian, and Goldasht; foliar application of zinc was in three levels (0, 0.5 and 1 kg. ha-1 Zn). Results showed that water deficit stress decreased stem diameter, head diameter, number of classes per plant, number of seeds per plant, seed yield, biological yield, oil yield, relative leaf water content. Whereas, water deficit stress increased the should be added of the should be added environment. Foliar application of 1 kg. ha-1 Zn improved seed yield, biological yield, oil yield, relative leaf water content.Conclusion: The results of this study showed that the water deficit stress significantly decreased the growth rate and consequently biological yield, oil yield, and relative water content (RWC) of safflower plants and on the other hand, the application of zinc under optimal irrigation (control) and water deficit stress improved the mentioned traits. Based on the obtained results, it can be stated that the application of zinc can be one of the appropriate solutions to mitigate the effects of water shortage in the grain filling stage of the studied cultivars of safflower. Manuscript profile -
Open Access Article
3 - The effect of soil type and compaction conditions on soil water characteristic curve
Mansure Bayram Omid BahmaniQuantitative evaluation of soil compaction to improve agricultural management practices and reduce the problems caused by compaction in the environment and production is essential, and such factors as compaction effort, soil type (%clay and soil plasticity) and water co MoreQuantitative evaluation of soil compaction to improve agricultural management practices and reduce the problems caused by compaction in the environment and production is essential, and such factors as compaction effort, soil type (%clay and soil plasticity) and water content condition have a significant impact on soil compaction. This research was conducted to study the effect of soil type and compaction on soil water characteristic curve with factorial experiment using randomized complete block design and 27 treatments were provided. Treatments consisted of three soil types: clay, clay loam and sandy loam under three compaction conditions: reduced, standard, and modified were performed. The compactions were performed in the three moisture conditions: dry, optimum and wet and undisturbed samples were provided as control. Mean comparison was conducted using Duncan's test and statistical analysis was performed by SAS statistical. The results showed that at all potentials, the influence of soil type on soil water retention was significant at the p Quantitative evaluation of soil compaction to improve agricultural management practices and reduce the problems caused by compaction in the environment and production is essential, and such factors as compaction effort, soil type (%clay and soil plasticity) and water content condition have a significant impact on soil compaction. This research was conducted to study the effect of soil type and compaction on soil water characteristic curve with factorial experiment using randomized complete block design and 27 treatments were provided. Treatments consisted of three soil types: clay, clay loam and sandy loam under three compaction conditions: reduced, standard, and modified were performed. The compactions were performed in the three moisture conditions: dry, optimum and wet and undisturbed samples were provided as control. Mean comparison was conducted using Duncan's test and statistical analysis was performed by SAS statistical. The results showed that at all potentials, the influence of soil type on soil water retention was significant at the p Manuscript profile -
Open Access Article
4 - Evaluating reduced tillage methods on energy productivity and rainfed wheat yield
Zein-al-Abedin ShamabadiThe so-called reduced tillage is one the most important management practices for soil and water conservation. In order to study the effect of reduced tillage on energy productivity and wheat yield in Kalpoush region of Shahrood, a randomized complete blocks de MoreThe so-called reduced tillage is one the most important management practices for soil and water conservation. In order to study the effect of reduced tillage on energy productivity and wheat yield in Kalpoush region of Shahrood, a randomized complete blocks design (RCBD) experiment with sunflower-wheat rotation was conducted having five treatments and four replicates. The treatments were consisted of chisel plowing at spring + disking (T1), moldboard plowing +disking (T2), reduced tillage with disk harrow (T3), disk plowing + disking (T4) and chisel plowing at autumn +disking (T5). Sunflower was planted at May 2008 and 2011. After harvesting at October 2008 and 2011, all plots were disked. Wheat was planted at November 2008 and 2011 and harvested at July 2009 and 2012. The results showed that there was no significant difference among the treatments (P<5%). In 2009 the maximum (1708 kg/ha) and minimum (1412 kg/ha) crop yield were belonged to T5 and T3 treatments, respectively. In 2011, the maximum (1638 kg/ha) and minimum (1388 kg/ha) yield was obtained from T5 and T2 treatments, respectively. Further data analysis showed that soil water content and wheat yield differences are not significant among the treatments (P<5%). The maximum and minimum soil moisture and wheat yield related to chisel and moldboard ploughs, respectively. Maximum and minimum energy productivity was related to disk harrow and moldboard ploughs, respectively. Chisel plugging increased the wheat yield. Soil inversion index difference was significant among the treatments (P<1%). Maximum and minimum soil inversion index related to moldboard and chisel ploughs, respectively. Considering disk harrow advantages and results of this experiment, for wheat production it may be recommended that plowing can be replaced by disk harrow, disk harrowing for seedbed preparation is sufficient, and plowing isn’t required. Manuscript profile -
Open Access Article
5 - Effect of irrigation with different salinities on some soil characteristics and salt concentration factor (Case study: Bighard, Khonj)
Ehsan Kamali Maskooni Seyed Fakhadin AfzaliBackground and Objective: Existence of water and soil salinity resources in arid and semiarid areas is an issue that affects agriculture and poses many problems. The adverse effect of water and soil salinity on growth and function of various crops in arid areas is a ser MoreBackground and Objective: Existence of water and soil salinity resources in arid and semiarid areas is an issue that affects agriculture and poses many problems. The adverse effect of water and soil salinity on growth and function of various crops in arid areas is a serious concern. The main objective of this study was to survey the impact of irrigation with different salinities on the changes in some soil properties in top soil. Method: For this purpose, 10 land transects in farmlands with different quality of irrigation were sampled at intervals of 6 m (15 samples). Parameters of electrical conductivity, field moisture content and saturation water content were measured for each sample, and then the salt concentration factor (SCF) was evaluated. Findings: The results showed that there is a significant relationship (R2>90) between ECe and ECw and between saturation water content and field moisture content in the whole lands which underwent transect sampling. The results also indicated that there is a significant relationship (R2>90) between the SCF and saturation water content in the whole lands that underwent transect sampling. Discussion and Conclusion: In general, the results of this study indicated that soil salinity was mainly influenced by water quality and poor water quality could change the physical properties of soil. Manuscript profile -
Open Access Article
6 - Evaluation of Relative Membrane Permeability of Sorghum (Sorghum bicolor) Affected Super Absorbent Polymer and Water Deficit Conditions
Mansour Fazeli Rostampour -
Open Access Article
7 - Effects of Mycorrhizal Fungi and Nano Zinc Oxide on Seed Yield, Na+ and K+ Content of Wheat (Triticum aestivum L.) under Salinity Stress
Raouf Seyed Sharifi Razieh Khalilzadeh Soraya Soltanmoradi -
Open Access Article
8 - Effect of Foliar Application of Methanol on Yield and some of Physiological Treats in Bean
M. MirAkhori, F. Paknejad Y. Reihani P. Nazeri F. Yeganeh Pour N. Jamshidi M. GaffariTo investigate the effects of methanol on relative water content (RWC) and leaf chlorophyll content of common bean an experiment was carried out at the Research Field of the Faculty of Agricultural and Natural Resources of Islamic Azad University, Karaj Branch in 2009. MoreTo investigate the effects of methanol on relative water content (RWC) and leaf chlorophyll content of common bean an experiment was carried out at the Research Field of the Faculty of Agricultural and Natural Resources of Islamic Azad University, Karaj Branch in 2009. A factorial experiment with randomized complete block design with three replications was used. First factor consisted of 8 levels of aqueous spraying on plants [0 (control), 10, 15, 20, 25, 30, 35 and 40% (v/v) methanol] by 3 times during growing season at 12 days intervals. Traits measured were grain yield, RWC, chlorophyll content and dry weight of the plants. These traits measured before and after methanol spraying. Results showed that were significant differences between methanol spraying solution on leaf chlorophyll content and RWC after second and third stages at 1% and on grain yield at 5% probability levels. Methanol using affected to dry weight accumulation. Means comparison showed that increasing levels of methanol foliar application increase chlorophyll content and relative water content. Effect of M3, M4 and M5 methanol levels on measured traits was greater than other treatments. Application of methanol increased grain yield, chlorophyll content, relative water content and leaf area. Manuscript profile -
Open Access Article
9 - Effect of Super Absorbent Polymer and Soil Texture Affecting the Physiological Response of Maize (Zea mays L.) under Water Deficit Stress
Alireza Moeini Ali Neshat Najme Yazdanpanah Amin Pasandi PourIn order to evaluate the role of super absorbent polymer (SAP) for mitigating the water deficit stress at sandy and clay-loam soils, the effect of five values of SAP (0, 0.1, 0.2, 0.4 and 0.8 g.kg-1 soil), three water treatment (the relative soil water content of 80, 60 MoreIn order to evaluate the role of super absorbent polymer (SAP) for mitigating the water deficit stress at sandy and clay-loam soils, the effect of five values of SAP (0, 0.1, 0.2, 0.4 and 0.8 g.kg-1 soil), three water treatment (the relative soil water content of 80, 60, and 40%) and two soil textures (sandy and clay-loam) on biomass production, photosynthetic pigments, leaf gas exchange parameters, leaf relative water content (RWC), electrolyte leakage (REC), proline content, catalase, super oxide dismutase, and ascorbate peroxidase activity. The experiment was carried out with a factorial arrangement based on complete randomized design in triplicates at the Agricultural and Natural Resources Research and Education Center, Kerman, Iran. The results revealed that water deficit stress caused a significant decrease in net photosynthesis rate, leaf stomatal conductance, chlorophyll a+b content, RWC, plant height, and dry matter production of maize. CAT, SOD, APX activity, REC, and proline were elevated with increasing water deficit stress levels. Application of SAP under water deficit stress increased the net photosynthesis (32.3%), stomatal conductance (38%), chlorophyll a+b (23.9%), RWC (11.9%), and dry matter production (24%), while it decreased REC (10.8%), proline content (66.9%), CAT (42.7%), SOD (33.2%), and APX activity (34.3%) as compared to control. It can be concluded that application of SAP (0.8 g.kg-1 soil) improved plant growth of maize under water deficit stress through increasing the water holding capacity in soil. Manuscript profile -
Open Access Article
10 - Evaluation of 20 Barley Genotypes under the Terminal Drought Condition
H. Tajalli S.G. Mousavi R. Baradaran M.H. Saberi E. ArazmjooTo study the response of barley genotypes to terminal drought stress, 20 promising barley genotypes were compared under two stress and non-stress conditions, in a split plot experiment based on randomized complete block design with three replications at the Agricultural MoreTo study the response of barley genotypes to terminal drought stress, 20 promising barley genotypes were compared under two stress and non-stress conditions, in a split plot experiment based on randomized complete block design with three replications at the Agricultural Research Center of Southern Khorasan during 2007-2008 growing season. Drought stress levels consist of control (complete irrigation) and irrigation up to the 50% heading stage. Results showed that skipping irrigation at 50% heading stage resulted in 14.64 reduction in seed yield and 8.12 percent in biological yield compared to control condition. Spike length, plant height and flag leaf area in drought condition decreased by 12.4, 7.65 and 24 percent against complete irrigation treatment. Also, irrigation up to the 50% heading caused increasing of chlorophyll index and cell membrane permeability and declining of relative water content of flag leaf. There weren’t any significant differences among barley genotypes in terms of biological yield but the highest and lowest grain yield achieved from genotype number 18 (5997.2 kg.ha-1) and genotype number 16 (3420.8 kg.ha-1) respectively. Cultivar number 5 and 13 had the highest rate of chlorophyll index, and also number 8 had the highest relative water content (80.7%) in flag leaf. Based on the results of this study, genotypes number 18 and 20 had higher yields in both normal and drought stress conditions. Manuscript profile -
Open Access Article
11 - Effect of Shading on some Important Physiological Traits in Lentil Crop
F. Darabi A. Hatami M.J. Zarea R. NaseriLight is one of the growth-reducing factors in mixed cropping and agroforestry systems. Therefore, an experimental field was conducted to justiffy the effect of light intensity on two lentil cultivars. It was performed in a factorial experiment based on randomized compl MoreLight is one of the growth-reducing factors in mixed cropping and agroforestry systems. Therefore, an experimental field was conducted to justiffy the effect of light intensity on two lentil cultivars. It was performed in a factorial experiment based on randomized complete block design with three replications at Agricultural Research Station of Ilam University during 2012-2013 cropping season. The factors under study consisted of shading in four levels (0 shading, 25, 50, 75 and 100% of shadings) and two cultivars lentil (Lens culinaris Medic) (Ziba and ILL4400). Results showed that physiologic traits were significantly affected by cultivar × shading intraction. Ziba cultivar had the highest chlorophyll a and b content in 100% shading. Carotenoid content, relative water content and leaf area index also increased with increasing in shading. The highest and lowest carotenoid and relative water contents were observed in 100% shading × ILL4400 cultivar and control treatment × Ziba cultiva, respectively. The highest leaf specific weight observed in control treatment × Ziba cultivar and decreased with increasing shading. Grain yield decreased with increasing shading. The highest and lowest mean grain yield, 2522 kg.ha-1 and 1137 kg.ha-1, were observed in control treatment × Ziba cultivar and 100% shading and ILL4400 cultivar, respectively. Based on the results of this study, Ziba cultivar had the highest leaf area index, relative water content and chlorophyll a in higher shading treatments; hence, it can perform better than ILL4400 in mixed cropping and agroforestry systems where the light is limited factor. Manuscript profile -
Open Access Article
12 - Effect of Foliar Application of Salicylic Acid on Yield and Yield Components of Pumpkin under Different Water Deficienies
Vahideh Biyare Farid Shekari Saeid Seifzadeh Hamidreza Zakerin Esmaeil HadidiPumpkin is one of the valuable medicinal plants which have high oil content in its seeds. The response of pumpkin was examined against controlled water deficiency with spraying salicylic acid under field conditions in 2015 and 2016 in split plot experiment based on comp MorePumpkin is one of the valuable medicinal plants which have high oil content in its seeds. The response of pumpkin was examined against controlled water deficiency with spraying salicylic acid under field conditions in 2015 and 2016 in split plot experiment based on complete randomized block design. The plants sprayed with 0, 0.5, 1 and 1.5 mM concentrations of salicylic acid at 5-6 leaf stages. After 15 days plants exposed to -0.3, -1.2 and -1.8 MPa water deficiency. Increasing water deficiency reduced RWC, chlorophyll and carotenoids content, plant height, number of nodes and branches per plant, fruit yield, fruit diameter, seed yield, number of seed per fruit and weight of 1000 seeds while it and also increased the diameter of mesocarp especially in -1.8 MPa treated plants. On the contrary, spraying with salicylic acid resulted in significant increase in RWC, chlorophyll and carotenoids contents, plant height, number of nodes and branches per plant, fruit yield, diameter of fruit, seed yield, number of seed per fruit and weight of 1000 seeds. Haghest salicylic acid effect observed at 1.5 mM concentration. Most of traits under study depicated their significant reduction at -1.8 MPa water deficiency, while other traits like leaf water content, plant height, chlorophyll a, b and total chlorophyll content, nodes per plant, number of branches and mesocarp diameter were reduced at -1.2 MPa. On the other hand, seed per fruit was increased significantly at -1.2 MPa as compared to -0.3 MPa water deficiency. The main reason for increment of seed number per fruit was due to reduction in mesocarp diameter and its weight. It seems that water deficiency changed the partitioning pattern of assimilates from fruit and shifted them to seeds against mesocarp or other parts of fruit. Among the yield components, seed number per fruit and number of fruit per land area had the most effect on yield formation. The variation in seed weight was not significant. According to results, pumpkin may considered as a tolerant plant to soil suction till -1.2 MPa, without a significant reduction in seed yield. Manuscript profile -
Open Access Article
13 - Evaluation of Water Deficit Tolerance of 10 Potato Cultivars (Solanum tuberosum L.)Based on some Physiological Traits and Tuber Yield in Ardabil Region
Alireza Nouri Ahmad Nezami Mohammad Kafi Davoud HassanpanahThis research was conducted to study the physiological traits affecting the yield of 10 different potato cultivars under water deficit conditions in a two-years study (2013 and 2014) in Ardabil Agricultural and Natural Resources Research Station. The study was performed MoreThis research was conducted to study the physiological traits affecting the yield of 10 different potato cultivars under water deficit conditions in a two-years study (2013 and 2014) in Ardabil Agricultural and Natural Resources Research Station. The study was performed in a split plot experiment based on randomized complete block design with three replications. The main-plots were three levels of irrigations (irrigation with 100%, 80% and 60% required water) and sub-plots consisted of 10 commercial potato cultivars (Khavaran, Savalan, Luca, Satina, Sante, Marfona, Caeser, Agria, Aula and Draga) released in the last 30 years. During the growing season, some physiological traits including relative water content, electrolyte leakage and chlorophyll content of the leaves were measured at their five different growth stages. Combined analysis of variance of traits showed that there were significant differences cultivars between years, and cultivars × water deficit stress interaction in all growth stages in terms of relative water content, electrolyte leakage, chlorophyll content and tuber yield. In terms of electrolyte leakage and chlorophyll content of the leaves, there were significant differences between years, different water stress levels, cultivars and cultivars × water stress level. In addition, in terms of tuber yield there were significant differences between years, water stress levels, cultivars and year × water stress level, cultivar × water stress level, cultivar × year. There were significant differences in chlorophyll content of the leaves under different irrigation conditios in the first, second, third and fifth growth stages of the potato. According to the results, under normal irrigation condition, cultivars Khavaran and Satina had higher relative water content, lower electrolyte leakage, higher chlorophyll content of the leaves and higher tuber yield. Under mild water stress condition, cultivars Caeser, Draga and Khavaran and under severe stress condition, cultivars Agria and Draga maintained higher relative water content and higher tuber yield; whereas cultivars Savalan, Luca, Satina and Marfona showed lower electrolyte leakage and higher tuber yield; and cultivar Savalan showed the highest chlorophyll content of the leaves and higher tuber yield under severe stress condition and thus were selected as tolerant cultivars to water deficit conditions. Manuscript profile -
Open Access Article
14 - Effect of NaCl Concentrations on some Morphological and Physiological Characteristics of Three Salicornia Species under Hydroponic Condition
behrooz tayebi Ahmad GhanbariTo compare morphological and physiological responses of three salicornia species to NaCl concentrations, a greenhouse experiment was carried out. The factors consisted of five levels of NaCl concentrations (5, 100, 200, 400 and 600 mML-1) and three Salicornia species (S MoreTo compare morphological and physiological responses of three salicornia species to NaCl concentrations, a greenhouse experiment was carried out. The factors consisted of five levels of NaCl concentrations (5, 100, 200, 400 and 600 mML-1) and three Salicornia species (Salicornia persica ، Salicornia perspolitana and Salicornia bigelovii ). The results showed that, simple effects of salinity and species on proline, glycinebethein, carbohydrates, chlorophyll a, chlorophyll b, relative water content, osmotic potential in shoots, dry and fresh weights were significant. Interaction effects between salinity and species on proline, glycine betaine, carbohydrates, chlorophyll a, chlorophyll b, osmotic potential in shoots, dry and fresh weight were also significant. Carbohydrates concentration increased by 70-80% at 400 mM and then decreased from 5% to 13% at 600 mM concentration. Increasing salt concentration up to 600 mM, increased proline and glycine betaine contents. Osmotic potential was also increased by 3 to 4 times with increasing salinity levels. The chlorophyll a and chlorophyll b contents decreased at 600 mM. At 200 mM NaCl concentration, wet and dry weights were significantly increased 2 to 3 times as compared control in all of three species while at 600 mM, it was decreased by 60% to 65%. It can be concluded that with increasing salt concentration all three species tolerated higher salt concentrations throught proline and glycine-betaine accumulation and reduction of osmotic potential. S.bigelovii had the highest Na+ accumulation at 600 mM of NaCl and least accumulation of K+, Ca2+ and Mg2+. On the other hand, S.perspolitana at 600 mM NaCl concentration, had the highest accumulation of potassium, calcium and magnesium, and was superior to other species in terms of dry weight yield under salinity. Manuscript profile -
Open Access Article
15 - Agro-Physiological Responses of Different Peal Millet (Pennisetum glaucum L.) Cultivars to Water Deficit in Kerman Climatic Conditions
Seyed Nabiladin Fatemi Ali Akbar Maghsoodi Mood Ghasem Mohammadi NejadCultivar selection is one of the most important factors to obtain maximum yield, based on the climatic conditions of each region. Drought is one of the environmental stresses that causes adverse effects on most stages of plant growth, structure and its activities. To in MoreCultivar selection is one of the most important factors to obtain maximum yield, based on the climatic conditions of each region. Drought is one of the environmental stresses that causes adverse effects on most stages of plant growth, structure and its activities. To investigate the agro-physiological responses of different pearl millet cultivars (Hybrid 1, Hybrid 2, IP13150, IP13151, IP22269, ICMV5222, HHVBCTA) to two levels of irrigation (100% and 60% of field capacity) an split plot experiment based on randomized complete block design was done in Kerman climatic conditions. The results showed that the simple effect of irrigation treatment and also simple effect of cultivar as well as the interaction of irrigation×cultivar were significant for all traits, except for relative water content and chlorophyll index. Decreasing the value of irrigation water from 100% to 60% of field capacity, caused significantly reduction of chlorophyll index (20.87%) and relative humidity content (29.06%). Drought stress increased proline content in all cultivars and the highest one was obtained from HHVBCTA under this condition. The results showed that the highest values of plant height, leaf area index, fresh and dry forage yield under normal irrigation and also drought stress conditions were obtained from Hybrid 1 and IP13151 cultivars, respectively. According to the comparison results of interaction, the lowest and highest percentage reduction of fresh forage of the due to drought stress were related to IP13151 (13.16%) and Hybrid 2 (61.58%), respectively. Generally, according to the obtained results, Hybrid 1 and IP13151 cultivars are suitable for planting in Kerman climatic region under normal and stress conditions, respectively. Manuscript profile -
Open Access Article
16 - The Physiological Response of Fennel (Foeniculum vulgare Mill.) to Manure and Super Absorbent Polymer under Drought Stress Conditions
Zahra Rezai Mohammad RafieolhossainiTo evaluate theeffect of different ratios of animal manure and super absorbent polymer on some physiological characteristics of fennel under drought stress conditions, an experiment was conducted as spilt-plot based on a randomized complete block design with three repli MoreTo evaluate theeffect of different ratios of animal manure and super absorbent polymer on some physiological characteristics of fennel under drought stress conditions, an experiment was conducted as spilt-plot based on a randomized complete block design with three replications in 2015 at the University of Shahrekord. Different levels of drought stress consisted of three levels of: control (50 mm), 100 mm and 150 mm evaporation from class A pan assigned to the main factor and different ratios of animal manure and super absorbent polymer in six levels including: D1: lack of manure and super absorbent polymer, D2: 10 t.ha-1 manure + 150 kg.ha-1 super absorbent polymer, D3: 20 t.ha-1 manure + 100 kg.ha-1 super absorbent polymer, D4: 30 t.ha-1 manure + 50 kg.ha-1super absorbent polymer, D5: 40 t.ha-1 manure and D6: 200 kg.ha-1 super absorbent polymer to the sub-factor. The results showed that the drought stress and animal manure and super absorbent polymer and their interactions had a significant effect on proline, chlorophyll b, and carotenoid contents, seed and essential oil yields. Also, the highest seed yield (146.66 g.m-2), essential oil yield (2.99 g.m-2) and carotenoid were obtained from control with D6. The highest proline content was obtained from 150 mm with the use of D4. The highest chlorophyll b was obtained from control and D3. The highest relative water content and total chlorophyll were obtained from control and D6, while the highest chlorophyll a was achieved from control and D4 treatment. In general, the highest seed and essential oil yields were obtained from 50 mm evaporation and 200 kg/ha superabsorbent polymer treatments. On the other hand, the effects of drought stress on seed and essential oil yields decreased by application of 40 t/ha manure at 100 mm evaporation conditions. Also, at 150 mm evaporation and use of manure and superabsorbent polymer (30 t.ha-1 and 50 kg/ha, respectively), the effects of drought stress on seed and essential oil yields decreased as compared to the other treatments. Manuscript profile -
Open Access Article
17 - Effect of Mycorrhizal Strain on Yield and Essence of Two Fennel (Foeniculum vulgare) Land Races under Water Stress Conditions
Bahram MirshekariThis study was aimed at the evaluation of yield and essence responses of two fennel (Foeniculum vulgare) local varieties to mycorrhiza under water stress conditions. It was performed in a split split plot experiment based on randomized complete block design at the Agric MoreThis study was aimed at the evaluation of yield and essence responses of two fennel (Foeniculum vulgare) local varieties to mycorrhiza under water stress conditions. It was performed in a split split plot experiment based on randomized complete block design at the Agricultural Research Station of Islamic Azad University, Tabriz Branch, Iran, during 2013. Factors under study were two fennel land races of Esfahan and Malayer assigned to main plots, three levels to irrigation (70, 100 and 130 mm evaporation from pan) to sub plots and use of two mycorrhizal strains (Rhizophagus intraradices and Funneliformis mosseaeas) and control to sub sub plot. Results revealed that relative water content of leaves in inoculated seeds were improved. It was also observed that chlorophyle content index of fennel leaves in inoculated plants increased by 39% compared to the control. When inoculated plants were irrigated at 100 mm evaporation from pan, it was increased in secondary branches by 4.7 per plant. Plants irrigated at 70 mm and 100 mm evaporation produced higher essence yield (18.5 l.ha-1), but its increase was only 11 l.ha-1 when plants irrigation at 130 mm evaporation. It is concluded that plants in semi arid areas may tolerate drought when seeds inoculated with mycorrhiza better than plants non-inoculated seeds. Manuscript profile -
Open Access Article
18 - Evaluation of physiological characteristics and antioxidant activity of sweet basil (Ocimum basilicum cv. Keshkeni luvelou) under different levels of methyl jasmonate and lead toxicity
Somaye Asadi Mohammad Moghaddam Abdollah Ghasemi Pirbalouti Amir FotovatThis study was performed in order to evaluate the effect of methyl jasmonate on some physiological characteristics and antioxidant activity of basil under lead toxicity, based on a factorial and completely randomized design with three replications at Ferdowsi University MoreThis study was performed in order to evaluate the effect of methyl jasmonate on some physiological characteristics and antioxidant activity of basil under lead toxicity, based on a factorial and completely randomized design with three replications at Ferdowsi University of Mashhad Research Greenhouse. The experimental treatments included Pb (NO3)2) at three levels of (0, 200, and 400 mg/kg soil) and foliar application of methyl jasmonate at three concentrations (0, 0.5, and 1 mM). Measured traits included chlorophyll a, b, and total, carotenoids, electrolyte leakage, relative water content, antioxidant activity, soluble carbohydrate, total phenol, and proline. Results showed that in the plants treated with lead, the amount of proline, relative water content, chlorophyll a, antioxidant activity and total phenol reduced in comparison with control plants and application of methyl jasmonate (0.5 mM) under lead stress increased these traits. Furthermore, electrolyte leakage increased significantly under lead stress, while it was decreased by spraying with methyl jasmonate. Therefore, using methyl jasmonate is justified for protecting economic performance of plants under stress. Also, application of 0.5 and 1 mM methyl jasmonate reduced and adjusted the effects of stress in the plants under lead stress through stimulating production of antioxidants. Manuscript profile -
Open Access Article
19 - Effect of the growth retardant chlormequat chloride (CCC) and different levels of nitrogen on some physiological and biochemical characteristics and yield of barley (Hordeum vulgare L.) cultivar makuyi
Ahmad Afkari Mitra AbbasiTo study the effects of different concentrations of chlormequat chloride and different levels of nitrogen on some physiological and biochemical characteristics and yield of barley (Hordeum vulgare L.) cultivar makuyi a factorial randomized complete block design was used MoreTo study the effects of different concentrations of chlormequat chloride and different levels of nitrogen on some physiological and biochemical characteristics and yield of barley (Hordeum vulgare L.) cultivar makuyi a factorial randomized complete block design was used with 4 replications in spring 2015. Treatments included chlormequat chloride concentrations (0, 500, 1,000, and 1500 mg/ha) and nitrogen at 3 levels (50, 100, and 150 kg/ha). Results suggest a significant difference between interaction effects of chlormequat chloride and nitrogen fertilizer on chlorophyll content, relative water content, yield and protein percentage, and activity of superoxide dismutase and catalase enzymes at 1% probability level and in the number of seeds per spike, 1000 seed weight, and glutathione peroxidase enzyme activity at 5% probability level. An increase in the consumption of nitrogen fertilizer decreased the relative water content of leaves due to reduced leaf water potential. Chlormequat chloride by transferring sufficient photosynthetic material to the seeds played an important role in their filling and increased seed weight. Also, the activities of superoxide dismutase, catalase, and glutathione peroxidase enzymes were decreased by increasing the consumption of chlormequat chloride concentration and nitrogen uptake. In general, through applying 1500 mg/ha chlormequat chloride and 150 kg/ha nitrogen, the highest chlorophyll content, relative water content, yield components, yield, and protein percent were obtained. Manuscript profile -
Open Access Article
20 - Effect of nano-TiO2 and salicylic acid foliar application on some physiological traits of Echinaceae purpurea L. under water deficit stress
Asiyeh Omid-Haghi Ebrahim Khalilvand Behrouzyar Farhad Farahvash Mehrdad Yarnia Abdollah HasanzadehIn order to investigate the effect of drought stress and nano-TiO2 and salicylic acid foliar application on some physiological traits of Echinaceae purpurea under water, an experiment was conducted in split plot factorial based on RCBD in three replications at the Resea MoreIn order to investigate the effect of drought stress and nano-TiO2 and salicylic acid foliar application on some physiological traits of Echinaceae purpurea under water, an experiment was conducted in split plot factorial based on RCBD in three replications at the Research Station of the Islamic Azad University, Tabriz Branch, during growing seasons of 2017-2018. The main factors were water deficit stress at three levels of 50, 75, and 100% filed capacity, thefactorial combination of nano-TiO2 (n-TiO2) foliar application at two levels (0.02 and 0.04%) and salicylic acid foliar application at two levels (0.02 and 0.04%), and also distilled water foliar application as control treatment. Findingsshowed a significant effect of water deficit stress on relative water content (RWC) and proline (p≤0.01). Also, interaction of the effects of water deficit stress and nano-TiO2 and salicylic acid foliar application on Chl. b, total Chl., and hydrogen peroxide contents was significant (p≤0.01). Application of water deficit stress treatment up to 50% FC increased proline content by 40% and reduced RWC by 10% compared to complete irrigation (100% FC). Furthermore, 0.04% n-TiO2 and 0.04% SA foliar application increased hydrogen peroxide content by 50% compared to complete irrigation group and the control. The maximum total Chl. Contents of leaves was obtained under 100% FC irrigation and and 0.04% n-TiO2 and 0.02% SA foliar application showing 79.52% increase compared to 100% FC irrigation and no foliar application. Manuscript profile -
Open Access Article
21 - Effects of Plant Growth Promoting Rhizobacteria (PGPR) and Arbuscular Mycorrhizal Fungi Inoculation on Lemon Balm (Melissa officinalis) Under Drought Stress
Olia Eshaghi Gorgi Hormoz Fallah yousof niknejad Davood Barari TariThe use of plant symbiosis with arbuscular mycorrhizal fungi (AMF) and Plant-growth-promoting rhizobacteria (PGPR) is one of the ways to reduce drought stress that has recently been used in agriculture. In the present study, the response of lemon balm (Melissa officinal MoreThe use of plant symbiosis with arbuscular mycorrhizal fungi (AMF) and Plant-growth-promoting rhizobacteria (PGPR) is one of the ways to reduce drought stress that has recently been used in agriculture. In the present study, the response of lemon balm (Melissa officinalis L.) plants to microbial inoculation of plant growth-promoting rhizobacteria (PGPR, Azospirillum brasilense) and arbuscular mycorrhizal fungus (AMF, Glomus mosseae) and co-inoculation (AMF+PGPR) under well-irrigated (100% field capacity) or drought stress (50% field capacity) conditions were investigated. This study was conducted in 2020 in the greenhouse of Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran as a factorial experiment based on a completely randomized design with five replications. The results of the present study showed that drought stress by reducing the relative water content (RWC, 17.8%), declined transpiration rate (E, 62.2%), stomatal conductance (gs, 36.8%), intercellular CO2 concentration (Ci, 22.5%), and net photosynthesis (Pn, 48.5%) of the plant compared to control plants. Drought stress also induced oxidative stress by increasing the accumulation of hydrogen peroxide (2.1-fold) and methylglyoxal (2-fold), resulting in damage to bio-membranes and photosynthetic apparatus and reduced growth of lemon balm. However, microbial inoculation, especially co-inoculation of PGPR and AMF, by improving the proline content and RWC, restored Ci, E, gs and Pn under drought stress. Microbial treatments by increasing the activity of antioxidant enzymes and the glyoxalase system reduced the level of hydrogen peroxide and methylglyoxal and alleviated drought stress-induced oxidative stress, which increased the growth of lemon balm under drought stress by protecting bio-membranes and photosynthetic pigments. Therefore, the results showed that the application of G. mosseae and A. brasilense alleviated the negative effects of drought stress on lemon balm. Manuscript profile -
Open Access Article
22 - Evaluation of some root growth traits and activity of enzyme and nonenzyme antioxidants of different cultivars of durum wheat (Triticum turgidum var. durum) effected by phosphorous fertilizer and mycorrhizal fungi in rainfed condition
Houshang Naseri Rad Rahim Naseri In order to evaluate the effect of mycorrhizal fungi and phosphorous fertilizer on some root growth traits and activity of enzyme and nonenzyme antioxidants of durum wheat in rainfed conditions, an experiment was carried out as factorial based on a randomized comp More In order to evaluate the effect of mycorrhizal fungi and phosphorous fertilizer on some root growth traits and activity of enzyme and nonenzyme antioxidants of durum wheat in rainfed conditions, an experiment was carried out as factorial based on a randomized complete block design with three replications at Sarableh Agricultural Research station during growing season 2018-2019. Four cultivars of durum wheat (Dehdasht, Zahab, Savarz and Saji) as the first factor and five levels of fertilizer source (control, 25 and 50 kg.ha-1 P, mycorrhizal fungi (GM), mycorrhizal fungi + 25 kg.ha-1 P) as the second factor were considered. The average comparison results of simple effects indicated that Zahab and Saji cultivars among cultivars and combination treatment of mycorrhizal + 25 kg / ha P and then 50 kg / ha P had the greatest effect on improving the studied traits. The interaction effect of cultivars and fertilizer sources revealed that the combined use of phosphorous fertilizer and mycorrhizal fungi had better results compared to their use alone. So that, the highest fresh and dry weight, length density, and root water content and activity of ascorbate peroxidase, peroxidase, catalase, superoxide dismutase and glutathione synthetase was obtained in combined treatment of mycorrhizal and phosphorus fertilizer at Zahab and Saji cultivars. However, the lowest specific root length, and malondialdehyde and hydrogen peroxide activity were obtained in the same treatment and cultivars. In general, the results showed that inoculation with mycorrhizal fungi in rainfed conditions, especially in Zahab and Saji cultivars, in addition to reducing the application of phosphorus fertilizer can improve root growth characteristics and activity of enzyme and nonenzyme antioxidants. As a result, it reduces the peroxidation of membrane lipids (the decline in production of malondialdehyde and hydrogen peroxide) and increases drought stress tolerance. Manuscript profile -
Open Access Article
23 - Effects of cycocel and micronutrients on yield, physiological traits, and antioxidant activity of maize (Zea mayz L.) in low irrigation conditions at the end of the season
Seyed Nouradin Ghaffari Alireza Shokuhfar Mani Mojaddam Shahram Lack Aziz AfarineshIn order to investigate the effect of cycocel and micronutrient consumption on yield, physiological traits, and antioxidant content of maize under low irrigation conditions at the end of the season, a split factorial experiment was carried out based on a randomized comp MoreIn order to investigate the effect of cycocel and micronutrient consumption on yield, physiological traits, and antioxidant content of maize under low irrigation conditions at the end of the season, a split factorial experiment was carried out based on a randomized complete block design with four replications in Safiabad Agriculture Research Center in Dezful during two cropping years 2017-18 and 2018-19. The main treatment included water stress with three levels control (without water stress), water stress in female flower formation stage and water stress in grain swelling stage. Also, foliar application of cycocel at three levels of control (no use of cycocel), 442.5 ppm, and 885 ppm and three levels of micronutrient fertilizers, namely control (no fertilizer application), foliar application of 1000 g. ha-1, and foliar application of 1500 g. ha-1 were considered as the sub-factors. Results of the combined ANOVA showed that the interaction of the effects of year, stress, micronutrient, and cycocel on relative water content, proline and grain yield and also the interaction of the effects of stress, micronutrient, and cycocel on hydrogen peroxide, glutathione peroxidase, and soluble proteins were statistically significant (p≤0.01). The results also showed that the highest activity of superoxide dismutase enzyme was obtained under stress conditions at the grain swelling stage, which showed an increase by about 37% compared to the irrigation treatment under optimal conditions. Foliar application of 1500 g. ha-1 micronutrient and 885 ppm cycocel in non-stress conditions increased the average grain yield (11500 kg. ha-1) in the second year by about 85% compared to stressed condition at grain swelling stage and no application of micronutrient and cycocel. In general, to increase grain yield under optimal irrigation conditions and reduce the drop in stress conditions, growth regulators such as cycocel with a concentration of 885 ppm and micronutrient foliar application at 1500 g. ha-1 are recommended. Manuscript profile -
Open Access Article
24 - The physiological and biochemical responses of directly seeded and transplanted maize (Zea mays L.) supplied with plant growth-promoting rhizobacteria (PGPR) under water stress
Saeed Rezazadeh Mohammadnabi ilkaee Fayaz Aghayari Farzad Paknejad Mehdi Rezaee -
Open Access Article
25 - Differential responses of two Iranian rice cultivars to arsenite toxicity
Mahdi Yousofinia Faezeh Ghanati Markus J. Tamas Hassan Zare Maivan -
Open Access Article
26 - تاثیر جدایههای قارچ تریکودرما بر تغییرات مرفوفیزیولوژیک گیاه گل مریم (Polianthes tuberose) تحت تنش خشکی
حمید رضا ذکاوتی محمود شور حمید روحانی سید فاضل فاضلی کاخکی ابراهیم گنجی مقدمبه­منظور ارزیابی اثر جدایههای مختلف قارچ تریکودرما بر کاهش اثرات تنش خشکی در گیاه زینتی گل مریم، دو آزمایش بصورت فاکتوریل بر پایه طرح کاملا تصادفی در سه تکرار، اجرا گردید. در آزمایش اول و دوم، فاکتور اول جدایه Bi وجدایه 65 قارچ تریکودرما هاریزیانوم هر کدام در Moreبه­منظور ارزیابی اثر جدایههای مختلف قارچ تریکودرما بر کاهش اثرات تنش خشکی در گیاه زینتی گل مریم، دو آزمایش بصورت فاکتوریل بر پایه طرح کاملا تصادفی در سه تکرار، اجرا گردید. در آزمایش اول و دوم، فاکتور اول جدایه Bi وجدایه 65 قارچ تریکودرما هاریزیانوم هر کدام در سه سطح (0، 10، 20 درصد حجمی گلدان) و فاکتور دوم در هر دو آزمایش، سه سطح تنش خشکی (25، 50 ،100 درصد ظرفیت زراعی) بود. نتایج نشان داد هر دو جدایه در شرایط تنش، باعث افزایش وزن تر و خشک زیستتوده و وزن خشک ریشه گل مریم در شرایط تنش شدند. وزن تر زیستتوده به مقدار 4 گرم در حالت تنش 25 درصد توسط جدایه Biو 14 گرم توسط جدایه 65 افزایش یافت که بیانگر افزایش رشد این گیاه در حضور قارچ تریکودرما میباشد. مقدار پرولین در جدایه 65 در سطح 20 درصد حجمی نسبت به سایر مقادیر همین قارچ در تنش 50 و 25 درصد افزایش یافت. میزان رطوبت نسبی و سطح سبز برگ با اعمال سطوح مختلف دو قارچ با افزایش سطح تنش افزایش یافت. به طور کلی به نظر میرسد که جدایه های Bi و 65 قارچ تریکودرما هارزیانوم تاثیرات متفاوتی در شرایط تنش خشکی دارد. Manuscript profile -
Open Access Article
27 - بررسی پاسخهای فیزیولوژیکی گل مریم (Polianthes tuberosa L.) در شرایط تنش کم آبیاری
خانی شاکرمی بهمن زاهدی عبدالحسین رضایی نژاد صادق موسوی فردتنش آب یکی از عوامل اصلی محدوده کننده تولید و آسیبهای شدید به گیاهان در ایران است. به­منظور بررسی و مقایسه اثر تنش کم آبیاری بر روی برخی خصوصیات فیزیولوژیکی، بیوشیمیایی و فعالیت آنزیمهای آنتیاکسیدانی گل مریم، آزمایشی با دو رقم گل مریم (پرپر و کم پر) و سه سطح تنش Moreتنش آب یکی از عوامل اصلی محدوده کننده تولید و آسیبهای شدید به گیاهان در ایران است. به­منظور بررسی و مقایسه اثر تنش کم آبیاری بر روی برخی خصوصیات فیزیولوژیکی، بیوشیمیایی و فعالیت آنزیمهای آنتیاکسیدانی گل مریم، آزمایشی با دو رقم گل مریم (پرپر و کم پر) و سه سطح تنش کم آبیاری (بدون تنش W1= 90% FC، تنش متوسط W2=75% FCو تنش شدید W3=60% FC) به­صورت فاکتوریل بر پایه طرح کاملاً تصادفی با سه تکرار انجام شد. محتوای آب نسبی، نشت الکترولیت، کلروفیل کل، کاروتنوئید، پرولین، میزان مالوندیآلدهید، فعالیت آنزیمهای آنتیاکسیدانی (سوپراکسیددیسموتاز، آسکوربات پراکسیداز و کاتالاز)، میزان فتوسنتز، میزان تعرق و مقاومت روزنهای مورد بررسی قرار گرفت. نتایج نشان داد که ویژگیهای فیزیولوژیکی و بیوشیمیایی گل مریم تحت تأثیر تنش کم آبیاری قرار گرفتند. میزان مالوندیآلدهید و نشت یونی همبستگی معنیداری با اکثر خصوصیات فیزیولوژیکی نشان داد. محتوای آب نسبی، کلروفیل کل، میزان فتوسنتز، میزان تعرق، مقاومت روزنهای، فعالیت سوپراکسیددیسموتاز و آسکوربات پراکسیداز در رقم کم پر نسبت به رقم پرپر افزایش معنی­داری نشان داد. همچنین میزان کاتالاز، مالوندیآلدهید و محتوای پرولین در رقم پرپر نسبت به رقم کم پر به­طور معنیداری بیشتر بود. نتایج این تحقیق نشان داد که رقم کم پر نسبت به رقم پرپر در شرایط تنش کم آبیاری، رشد بهتری داشت. Manuscript profile -
Open Access Article
28 - The Effects of Different Floral Preservative Solutions on Vase life of Lisianthus Cut Flowers
M. Kiamohammadi D. HashemaabadiTwo factorial experiments were conducted to study the interactive effects of four levels of sucrose (0, 20, 40 and 60 g l-1), two levels of citric acid (0 and 160 mg l-1) and two levels of one of the following compounds (aluminum sulphate, 0 and 160 mg l-1 and silver ni MoreTwo factorial experiments were conducted to study the interactive effects of four levels of sucrose (0, 20, 40 and 60 g l-1), two levels of citric acid (0 and 160 mg l-1) and two levels of one of the following compounds (aluminum sulphate, 0 and 160 mg l-1 and silver nitrate, 0 and 120 g l-1) on vase life and quality attributes of lisianthus cut flowers ‘Mariachi blue fonce.’ The experiments carried out a randomized complete block design with three replications. After 34 days of storage at 20±2 oC the amount of water absorption, relative water content and opened flower buds were determined. According to the results application of 60 g l-1 sucrose in combination with citric acid led to the highest vase life (31 days). The highest relative water content (82.37%) and also the highest percentage of opened flower buds were obtained in flowers treated with 60 g l-1 sucrose and 160 mg l-1 aluminum sulphate. Manuscript profile -
Open Access Article
29 - Effect of silicon application on morphological and physiological characteristics of sunflower (Helianthus.annuus L.) under different moisture levels
zohreh nabipour Gholamreza Zamani Available water is the main factor limiting crop growth and production in arid areas. In this regard, in order to investigate the effect of silicon application on morphological, physiological and yield characteristics of sunflower under different mois More Available water is the main factor limiting crop growth and production in arid areas. In this regard, in order to investigate the effect of silicon application on morphological, physiological and yield characteristics of sunflower under different moisture levels, an experiment was conducted in the crop year 2018-2019 in Gonabad, Iran. This study was conducted as a split plot in a randomized complete block design with three replications. The main factor of irrigation with different moisture levels based on water requirement includes four levels (100% water requirement, 80% water requirement, 60% water requirement and 40% water requirement) and the secondary factor of silicon consumption time. There were four levels (no application (control), application in vegetative stage, application in reproductive stage, application in vegetative stage and reproductive stage). The results showed that reducing the moisture level from 100% to 40% of water requirement reduced the quantitative traits studied; So that the lowest seed yield (1730.8 kg / ha) and oil yield (583.41 kg / ha) were obtained in the treatment of moisture level of 40% of water requirement. Also, the application of silicon under low moisture levels based on water requirement improved the effects of reducing moisture levels in all evaluated traits and seed yield. The highest seed yield (7572.96 kg / ha) was obtained in the treatment of 80% water requirement and application of silicon in the vegetative and reproductive stages and the lowest value (1193.54 kg / ha) was obtained in the treatment of 40% water requirement and without the use of silicon. Also, the application of silicon in the vegetative and reproductive stages compared to the non-application treatment (control) increased 2.5, 1.5 and 2.5 times the oil yield at different levels of moisture, including 80, 60 and 40% of water requirement. In general, the results showed that the use of silicon in the vegetative and reproductive stages at a moisture level of 80% of the water requirement compensated for the adverse effects of reducing the moisture level in the studied traits. Manuscript profile -
Open Access Article
30 - Effect of Nanoparticles of Selenium (Nano-Se) and Rice bran Extract on Germination and Some Morphophysiological Characteristics of (Astragalus adscendens Boissier)
Reza Dehghani BidgoliIn order to investigate the effect of seeds priming of Astragalus adscendens with Rice bran extract and potassium nitrate (Nano-Se) solution in the early stages of germination, a factorial experiment was conducted in a completely randomized design (CRD) with four replic MoreIn order to investigate the effect of seeds priming of Astragalus adscendens with Rice bran extract and potassium nitrate (Nano-Se) solution in the early stages of germination, a factorial experiment was conducted in a completely randomized design (CRD) with four replications conducted at the botany Lab of the Department of Biotechnology, University of Kashan, in 2017. Experimental treatments consisted of priming with Rice bran extrac solution at 4 levels (zero as control, 0. 1, 0.2 and 0.5 (percentage of weight - Volume: w/v), and Nano-Se in 4 levels (zero as control, 0.04, 0.08 and 0.1) w/v for 2 hours at 25 ° C. The results of the experiments showed that Rice bran extract, Nano-Se solution and interaction of treatments were significant at the 1 % level on all studied traits, including germination percentage, root length, stem length, germination coefficient, relative content of water, chlorophyll a, b and total chlorophyll content. Also, the use of rice bran extract 0.1% increased the 15%. of root length but with Increasing the concentrations of bran extract root and shoot length decreased compared to control. Also, seeds priming with rice bran extract 0.2% and Nano- Se 0.8% increased the root length 37%. The highest germination percentage, the content of chlorophyll a and b, and stem length were obtained by applying 0.11% w / v Rice bran extract solution with 0.1% w/v of Nano-Se . Also, applying these treatments alone had positive and significant effects on the studied traits. Manuscript profile -
Open Access Article
31 - Annual Water Yield Estimation for Different Land Uses by GIS-Based InVEST Model (Case Study: Mish-khas Catchment, Ilam Province, Iran)
Ali Akbar Jafarzadeh Ali Mahdavi Rashid FallahShamsi Rasoul Yousefpour -
Open Access Article
32 - Evaluation of effects of different Urea top-dressing methods and foliar application of selenium on wheat under rain fed condition
Mohammad Konani Nourali SajediThis experiment was carried out to investigate effects of foliar application of selenium and different Urea top-dressing methods on agronomic and physiological characteristics of rain fed wheat sardari cultivar during the growing season 2012-2013. Experimental factors w MoreThis experiment was carried out to investigate effects of foliar application of selenium and different Urea top-dressing methods on agronomic and physiological characteristics of rain fed wheat sardari cultivar during the growing season 2012-2013. Experimental factors were four levels of different Urea top-dressing methods (without application of Urea top-dressing; application of 60 kg/ha in tillering stage; application of 30 kg/ha in tillering stage combined with 200 mg/Lit before spike emergence; application of 20 kg/ha in tillering stage combined with 200 mg/Lit before spike emergence and 200 mg/Lit in the last spike emergence stage) and three levels of selenium (0, 5 and 10 mg/Lit). The results showed that the foliar application of selenium at 5 and 10 mg/lit decreased cell ion leakage by 6.7% and 5.3% compared to control, respectively. The application of 20 kg Urea/ha in the tillering stage combined with twice foliar application in reproductive stage at 200 mg/Lit along with foliar application of 10 mg/Lit selenium increased grain yield by 44.3% compared to the control and 12% compared to treatment of application 60 kg Urea/ha in the tillering stage. It could be concluded that by applying of 30 kg Urea/ha in the tillering stage combined with once foliar application in reproductive stage can be decreased by 50% Urea fertilizer application and obtain optimum yield. Manuscript profile -
Open Access Article
33 - Response of morphophysiological of maize to plant growth promoting rhizobacteria, Zinc fertilizer and irrigation interval
Seyyed Gholamreza MoosaviIn order to study of water deficit stress and application of Zinc fertilizer and two strains of rhizobacteria including Pseudomonas putida (Sp) and Pseudomonas fluorescens (Pf) on morphophysiological traits and seed yield of maize, a expriment was carried out as a split MoreIn order to study of water deficit stress and application of Zinc fertilizer and two strains of rhizobacteria including Pseudomonas putida (Sp) and Pseudomonas fluorescens (Pf) on morphophysiological traits and seed yield of maize, a expriment was carried out as a split plot-factorial design based on randomized compelate block with three replications at Mahvalat Razavi Khorasan provience, Iran in 2012.Irrigation intervals of 6, 9 and 12 days were as main plots and rhizobacteria (non inoculation, Sp and Sf) and Zinc fertilizer (0 and 50 kg Zinc sulphate ha-1) were as sub plots. Plant height, stem diameter, ear diameter and length, leaf rolling index, relative water content and seed yield were evaluated in this expriment. The results indicated that water deficit stress decreased significantly all mentioned above traits. Also PGPR inoculation increased all traits with except to leaf rolling index. Zinc sulphate application significantly increased plant height, ear length and seed yield. As irrigation interval increased from 6 to 12 days, leaf rolling index increased 3.2 times and seed yield decreased 57.3%, but zinc sulphate and Pseudomonas bacteria application significantly decreased leaf rolling index and significantly increased seed yield. Seed yield significantly affected by double interaction. In conclusion zinc sulphate application and seed inoculation by Pseudomonas can be recommended for maize cultivation, espically in semi-arid and arid conditions. Manuscript profile -
Open Access Article
34 - Effect of different irrigation regimes, plastic mulch and anti-transpiration materials on some physiological attributes and grain yield of rainbow corn
Davoud Adelian Hooshang Farajee Amin Salehi Ali Moradiبه منظور بررسی اثر خاکپوشه پلاستیک و مواد ضد تعرق کائولین و آترازین تحت تاثیر سطوح مختلف آبیاری بر برخی صفات فیزیولوژیک و عملکرد دانه ذرت رنگین، آزمایشی مزرعهای در منطقه برازجان، استان بوشهر در دو سال 1396-1395 اجرا گردید. آزمایش بهصورت اسپلیت اسپلیت پلات بر پایه طرح Moreبه منظور بررسی اثر خاکپوشه پلاستیک و مواد ضد تعرق کائولین و آترازین تحت تاثیر سطوح مختلف آبیاری بر برخی صفات فیزیولوژیک و عملکرد دانه ذرت رنگین، آزمایشی مزرعهای در منطقه برازجان، استان بوشهر در دو سال 1396-1395 اجرا گردید. آزمایش بهصورت اسپلیت اسپلیت پلات بر پایه طرح بلوکهای کامل تصادفی با سه تکرار اجرا شد. عامل اصلی آزمایش شامل آبیاری در سه سطح، شامل: 1) 25 درصد تخلیه رطوبتی آب قابل استفاده خاک؛ 2) 40 درصد تخلیه رطوبتی آب قابل استفاده خاک و 3) 60 درصد تخلیه رطوبتی آب قابل استفاده خاک و عامل فرعی در دو سطح شامل خاکپوشه پلاستیک و بدون خاکپوشه و عامل فرعی فرعی در سه سطح شامل مواد ضد تعرق کائولین، آترازین و شاهد بدون مصرف ماده ضد تعرق بودند. نتایج نشان داد که برهمکنش سطوح مختلف آبیاری، مواد ضد تعرق بر نسبت Fv/Fm و برهمکنش خاکپوشه پلاستیک و مواد ضد تعرق بر میزان قند محلول برگ معنیدار گردید. در سطح آبیاری 60 درصد تخلیه مجاز رطوبتی، بیشترین نسبت Fv/Fm (578/0) در تیمار آترازین و کمترین مقدار آن (468/0) در تیمار کائولین بدست آمد. در شرایطی که میزان رطوبت خاک محدود است، استفاده از خاکپوشه پلاستیک و آترازین جهت حصول حداکثر عملکرد کیفی و کمی قابل توصیه میباشد. Manuscript profile -
Open Access Article
35 - Effect of different irrigation levels on morphological and physiological features of SPORT grass-seed mixture
Amin Samiei Mohsen Kafi Mohammadmahdi Jowkar Arezo ShaghaghiWater resource management is one of the major challenges in lawn management. Considering the fact that Iran is located in a dry and semiarid area, lawn water demand and resource management is very crucial. Therefore, in the present study, the effect of irrigation levels MoreWater resource management is one of the major challenges in lawn management. Considering the fact that Iran is located in a dry and semiarid area, lawn water demand and resource management is very crucial. Therefore, in the present study, the effect of irrigation levels on some growth traits of turf sport mixture was studied. Irrigation treatments consisted of 50, 75 and 100 % of field capacity with one-day interval watering frequency which were applied when the plants were stablished. Morphological and physiological traits were measured at weeks two, four and six after applied levels of irrigation. Results showed that as the amount of watering decreased, turf longitudinal growth, dry matter, visual quality, relative water content and leaf phosphor content declined. This was while cell electrolyte leakage increased. However, at 75 % of field capacity irrigation level, leaf total chlorophyll and potassium content was more than 100% of field capacity irrigated plants. Based on the obtained results, there was no significant difference between two levels of 100 and 75% of field capacity irrigation levels for all measured traits. This was while both irrigation levels were significantly better than 50% of field capacity. Generally, the results indicated that reducing irrigation by one-fourth of field capacity maintains the quality and quality of “Sport” mixture grass in normal conditions and at the same time, greatly reduces the amount of consumed water for irrigation. Manuscript profile -
Open Access Article
36 - Effect of Spermidine foliar applciaiton on biochemical properties of cucumber (Cucumis sativus L.) under drought stress
Mohsen Farzaneh Mozhgan Ghanbari Vahid AbdossiSpermidine effect on biochemical properties consisted of activity of peroxidase, ascorbate peroxidase, relative water content, soluble sugar, and electrolyte leakages in cucumber (Cucumis sativus L.) was investigated. An experiment was conducted based on CRD with three MoreSpermidine effect on biochemical properties consisted of activity of peroxidase, ascorbate peroxidase, relative water content, soluble sugar, and electrolyte leakages in cucumber (Cucumis sativus L.) was investigated. An experiment was conducted based on CRD with three replications in Islamic Azad University, Shiraz Branch. The first factor was included different irrigation courses at three levels; irrigation every other day, irrigation three days in between and irrigation five days in between. Second factor was included foliar application with three different concentration of spermidine (0, 1 and 2 mM). The resuls of variance analysis for interaction effect of different courses of irrigation and various concentration of spermidine on peroxidase enzyme activity, ascorbate peroxidase activity and relative water content was significant. The results also showed that plants that recived irrigation five days in between with 2mM Spermidine had the highest activity of peroxidase and ascorbate peroxidase enzyme. The interaction of different levels of irrigation and Spermidine foliar applciaiton on sugar solution and electrolyte leakages was not significant. In conclusion the effect of 2mM Spermine on peroxidase enzyme activity, ascorbate peroxidase activity and relative water content was significant. Manuscript profile -
Open Access Article
37 - The Effect of Salinity on Potassium, Sodium Accumulation and Aerial Parts Yield of Two Triticale (Triticosecale wittmack X ) Ecotypes during Different Growth Stages
Safora Farhang mehr Shiva Akbari Shahram Rezvan BeidokhtiSalinity is one of the main ecological factors that threaten the stability in dry and semi-dry lands and specifically in the lands that evaporation and transpiration dominate rainfall. In order to study the effect of different salinity levels on sodium and potassium con MoreSalinity is one of the main ecological factors that threaten the stability in dry and semi-dry lands and specifically in the lands that evaporation and transpiration dominate rainfall. In order to study the effect of different salinity levels on sodium and potassium concentration, aerial yield and relative water content of two triticale ecotypes, an experiment was performed basis on a complete randomized design with two factors and three replications in research greenhouse of the Islamic Azad university of Damghan. The first factor consisted of different salinity levels (0, 3, 6, 9, 11, 14 ds/m) built-up with pure NaCl and the second factor was two triticale ecotypes (Esfahan and Varzaneh). The result showed that by increasing the salinity the aerial yield and relative water content significantly decreased at all three growth stages which were before flowering, start of pregnancy and seed fermentation. At all three growth stages, the salinity significantly increased the concentration of sodium and potassium ions in the leaves of plant. The effect of ecotype and the interaction effect of salinity and ecotype were also significant on content of potassium at all growth stages but the interaction effect of salinity and ecotype on the sodium content was significant only at seed fermentation stage. The concentration of potassium ions was higher in Esfahan ecotype in all growth stages in comparison with the other ecotype. Therefore, it can be concluded that Esfahan ecotype is more tolerant to salinity stress at all growth stages in comparison with Varzaneh ecotype. Manuscript profile -
Open Access Article
38 - Study the effect of pre-treatment of seed with hydrogen peroxide on physiological and yield attributes traits of mung bean (Vigna radiata L.) under drought stress conditions
Omid Sadeghipour حوریه بابایی علیرضا پازکیIn order to evaluate the effect of seed priming with hydrogen peroxide (H2O2) on drought tolerance of mung bean this factorial pot experiment was carried out based on a completely randomized design with 4 replications in the research field of Yadegar-e-Imam Khomeini, Sh MoreIn order to evaluate the effect of seed priming with hydrogen peroxide (H2O2) on drought tolerance of mung bean this factorial pot experiment was carried out based on a completely randomized design with 4 replications in the research field of Yadegar-e-Imam Khomeini, Shahre-rey Branch, Islamic Azad University on 2013. The first factor was irrigation, including irrigation after 60 and 120 mm evaporation from pan evaporation as normal and drought conditions, respectively. The second factor was 5 levels of seed soaking in various concentrations of H2O2 (0, 30, 60, 90 and 120 mM) for 6 hours. Results showed that drought stress significantly decreased plant height, biomass, yield and yield components, leaf area, relative chlorophyll content, stomatal conductance and relative water content. Nonetheless, pretreatment of seeds with 90 mM H2O2 increased all mentioned traits under drought conditions. This treatment raised seed yield of plant by 25% as compared to control under drought conditions. These results indicated that pretreatment with H2O2 improved growth and drought tolerance of mung bean plants by increasing chlorophyll content, stomatal conductance, relative water content and leaf area. Manuscript profile -
Open Access Article
39 - Studying the effect of irrigation regimes and superabsorbent on proline and soluble sugars and their relationship with forage dry matter of sorghum
mansour fazeli rostampour mehrdad yarniya Gh. Mosavi M.J. SeghataleslamiStudying the effect of irrigation regimes and superabsorbent on proline and soluble sugars and their relationship with forage dry matter of sorghum Abstract In order to investigate the possibility of decreasing sorghum water requirements with application of SAP and to MoreStudying the effect of irrigation regimes and superabsorbent on proline and soluble sugars and their relationship with forage dry matter of sorghum Abstract In order to investigate the possibility of decreasing sorghum water requirements with application of SAP and to investigate the relationship between the accumulation of proline and soluble sugars with leaf relative water content (RWC) and forage yield in sorghum variety Speedfeed this experiment was conducted in Dashtak region of Zahedan during 2013 and 2014 seasons in a split plot with four irrigation regimes, providing 40, 60, 80 and 100% of the water requirements of sorghum, calculated from pan evaporation as main plots, four amounts of SAP )0, 75, 150 and 225 kg ha-1( as subplots based on a completely randomized block design with three replications. The results indicated that the effect of irrigation regimes, SAP levels and interaction effects of two factors in all measured traits were significant. The regression models estimated for two years showed that although applying SAP in 100% ETc treatment had no effect on this trait in 2 seasons but the other irrigation treatments reduced the accumulation of proline and soluble sugars and increased the RWC and dry matter. Therefore, applying 75 kg SAP per hectare along with 20% decrease in the sorghum’s water requirement produced a dry matter yield Similar to 100% water treatment. Manuscript profile -
Open Access Article
40 - The evaluation of antioxidant enzymes role in seed yield of some wheat (Triticum aestivum L.) genotypes under drought stress at post anthesis
P. Sharifi N. MohammadkhaniIn order to study the effects of drought stress on antioxidant enzymes activity, lipid peroxidation, chlorophyll content and grain yield of wheat cultivars, an experiment was conducted with a factorial arrangement in randomized complete block design with three replicate MoreIn order to study the effects of drought stress on antioxidant enzymes activity, lipid peroxidation, chlorophyll content and grain yield of wheat cultivars, an experiment was conducted with a factorial arrangement in randomized complete block design with three replicates in field of Agricultural Dryland Research Station, Maragheh, Iran. Six wheat genotypes and four irrigation treatments (control, 7, 17 and 23 days after anthesis) were used in this study. Genotypes were included Azar-2 and Sardari (Drought tolerant), HN7 and DH-2049 (moderately tolerant), and Sara and TEVEE (drought sensitive). Results showed that drought stress at different times after anthesis led to decrease in relative water content (on average from 82.5% to 53.5%) and chlorophyll content (on average from 12.33% to 3.17%) in flag leaves of different wheat genotypes. Activity of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (POX) were significantly increased under drought conditions. It was also observed that tolerant genotypes which had lower MDA and RWC content and higher chlorophyll contents in drought conditions also showed the higher antioxidant enzymes activity than sensitive genotypes. It seems that lower antioxidant enzymes activity in sensitive genotypes caused a decrease in drought tolerance and therefore higher yield reduction in these genotypes (on average from 3150.23 kg per hectare to 1400.21 kg per hectare, 55.55% decrease) compare to tolerant genotypes (on average from 2800.72 kg per hectare to 1850.69 kg per hectare, 33.92% decrease). Manuscript profile -
Open Access Article
41 - Evaluation of Cell membrane Instability of Oily Sunflower Varieties under Water Deficit and Salicylic Acid Application
Mohammad Sibi Mohammad Mirzakhani Masoud Gomarian Hesamedin YaqobiExperimental treatments comprised of water stress as a major factor in three levels including I0 = irrigation water requirement of crop (control), I1= 80 percent of the amount of irrigation water requirements of crop, I2= 60 percent of the amount of irrigation water req MoreExperimental treatments comprised of water stress as a major factor in three levels including I0 = irrigation water requirement of crop (control), I1= 80 percent of the amount of irrigation water requirements of crop, I2= 60 percent of the amount of irrigation water requirements of crop in the main plots and different varieties of sunflower including V1= Azargol, V2= Alstar, V3= Ariflor and two levels of salicylic acid containing SA0= without salicylic acid and SA1= with salicylic acid (sprayed) as a minor factor in a factorial combination of sub-plots. The results showed the very significant effect (p<0.01) of different levels of water stress and varieties of sunflower on stem diameter, number of leaves, number of hollow grains, biological yield, ion leakage of cell (cell membrane instability), leaf water content, initial water content and ultimate water of leaf. Salicylic acid also had significant effect on number of leaves, cell ion leakage (cell membrane instability), leaf water content, initial water content and leaf ultimate water at a level of statistical significance, whereas stem diameter, number of hollow grains and biological yield did not affected by salicylic acid. Thus, ion leakage cell increased with increasing intensity of water deficit, therefore the highest average of ion leakage (2854.9 μs) obtained from extreme stress (60 percent of the amount of irrigation water requirements of crop). Manuscript profile -
Open Access Article
42 - Study the physiological responses of mung bean (Vigna radiata L.) as affected by irrigation with magnetized water under drought stress
Omid SadeghipourIn order to investigate the effect of magnetized water on drought tolerance of mung bean (Vigna radiata L.) Partow cultivar, a pot experiment was done in Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University at 2013. This experiment was conducted in factorial at MoreIn order to investigate the effect of magnetized water on drought tolerance of mung bean (Vigna radiata L.) Partow cultivar, a pot experiment was done in Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University at 2013. This experiment was conducted in factorial at the basis of completely randomized design with four replications. The first factor consisted of two irrigation levels including irrigation after 50 and 100 mm evaporation from class A evaporation pan as control and drought stress conditions, respectively. The second factor consisted of two types of water including tap water and magnetized water. Results showed that drought decreased chlorophyll content, stomatal conductance, relative water content, leaf area and net photosynthetic rate; nevertheless irrigation with magnetized water reduced drought damages via improving all of these traits. In irrigation with tap water, the higher and lower net photosynthetic rat were 8.70 and 5.60 µmol CO2 m-2 s-1 under normal and drought conditions, respectively. Nonetheless, in irrigation with magnetized water, the higher and lower net photosynthetic rat were 10 and 6.29 µmol CO2 m-2 s-1 under normal and drought conditions, respectively. Therefore, after supplementary field studies and observing magnetized water effect on yield and yield components and economical computing, this treatment, as simple, safe and practical method can use for improvement drought tolerance of mung bean. Manuscript profile -
Open Access Article
43 - The effect of bio fertilizers on some growth parameters and essential oil of Moldavian dragonhead under drought conditions
Hoseein Gorgini Shabankareh محمد رضا اصغری پور براتعلی فاخریOne of the fundamental pillars in sustainable agriculture is use of bio-fertilizers in agro-ecosystems in order to eliminate or reduce the use of chemical inputs. The experimental design was a split plot with four irrigation regimes: irrigation at 40 %, 60 %, 80 % and 1 MoreOne of the fundamental pillars in sustainable agriculture is use of bio-fertilizers in agro-ecosystems in order to eliminate or reduce the use of chemical inputs. The experimental design was a split plot with four irrigation regimes: irrigation at 40 %, 60 %, 80 % and 100% FC (as control) comprising the main treatments, and four biological fertilizers including nitroxin, super nitroplas and biophosphor and non-fertilizer (as control) as the sub -treatments that were applied with three replications. The experiment was conducted in 2013 at the Zabol University research farm in Zabol, south Iran. Nitroxin treated plants had the highest leaf relative water content, plant height, number of lateral branches, fresh and dry weight and followed by nitroplas and biophosphor. Plants irrigated at 80 % FC had the higher plant height, number of lateral branches, fresh and dry weight. While the greatest relative water content was achieved at irrigation at 100 % of FC (control). The experimental results suggested that application of nitroxin along with irrigation at 80 % FC could be useful in drought conditions. Manuscript profile -
Open Access Article
44 - Pretreatment with hydrogen peroxide (H2O2) reduces the negative effects of salt stress on wheat
T. Jfarian M.J. ZareThe purpose of this study was to investigate the effect of hydrogen peroxide pretreatment on morphological characteristics, physiological and biochemical ON wheat seedling under salt stress conditions. In this regards a greenhouse experimentation carried out as factoria MoreThe purpose of this study was to investigate the effect of hydrogen peroxide pretreatment on morphological characteristics, physiological and biochemical ON wheat seedling under salt stress conditions. In this regards a greenhouse experimentation carried out as factorial based on randomized complete block design with three replications and three levels of salinity (0, 80 and 120 mM NaCl), and four levels of hydrogen peroxide ( 0, 25 , 50 , 80 mM). Hydrogen peroxide caused an increase of Catalase and ascorbate peroxidase in wheat seedling under salinity condition. This increase was associated with reducing the damage of free radicals in produced wheat. Under salinity stress pre-treated wheat with hydrogen peroxide had higher chlorophyll and relative water content. Also Hydrogen peroxide reduced the negative effect of salinity on water, height and root dry weight of wheat seedling. There was no significant effect of hydrogen peroxide on ionic leakage. Overall seed priming with hydrogen peroxide improves the physiological and biochemical characteristics of wheat and increase its resistance to salt stress conditions. Manuscript profile -
Open Access Article
45 - Investigation of Polyethylene Mulch on Improvement of Tomato Water Use Efficiency using AquaCrop Model
razieh Eskandaripour afshin khorsand vahid rezaverdinejad kamran zeinalzazdeh amir NorjooIn this study, the Aquacrop model was evaluated to predict the crop yield and the water use efficiency of tomato in climatic conditions Kahriz region, and use mulch cover was modeling. The research was carried out at split plot factorial experiment based on randomized d MoreIn this study, the Aquacrop model was evaluated to predict the crop yield and the water use efficiency of tomato in climatic conditions Kahriz region, and use mulch cover was modeling. The research was carried out at split plot factorial experiment based on randomized design. The factors of between-row spacing (100 and 120cm), in-row spacing (30 and 40cm) and black plastic were studied. The treatment of black plastic were: full ridge and half furrow were covered by mulch; full furrow and half ridge were covered by mulch and control (no mulch). Every plot was irrigated separately. The model was calibrated by the use of first year’s data, and as a result on the base of R2 (0.99) and NRMSE (0.19). Efficiency parameters, it is obvious that Aquacrop appropriately simulates the crop yield, WUE and soil water content of the root zone for tomato under different planting densities and three types of mulch. Manuscript profile -
Open Access Article
46 - Evaluation of Some Physiological Traits and Oil Yield in Different Safflower Genotypes under Irrigation Interruption
Sayed Mohammad Taghi Tabib Loghmani forood Bazrafshan omid alizadeh Bahram Amiri , Abdollah BahraniIn order to evaluate the safflower genotypes in response to drought stress, a split plot experiment was conducted in a randomized complete block design with three replications in Sarvestan region during 2016 and 2017 growing season. The main plot consisted of two levels MoreIn order to evaluate the safflower genotypes in response to drought stress, a split plot experiment was conducted in a randomized complete block design with three replications in Sarvestan region during 2016 and 2017 growing season. The main plot consisted of two levels of normal irrigation and irrigation interruption from the emergence of the first pods and sub plots including fifteen safflower genotypes. Evaluated indices were included grain yield, relative water content of leaves (RWC), oil content, oil yield and drought tolerance indices. Combined analysis results indicated that water deficit stress had adverse effect on all above indices. Effect of genotypes, also was significant on evaluated indices. Results of combination analysis showed that in two irrigation conditions, Dincer and PI-537598 cultivars had the highest grain yield, RWC and oil yield. Based on GMP and STI drought tolerance indices, Dincer cultivar had the highest GMP and STI, and based on the percentage reduction of grain yield, PI-537636-s genotype (57%) had the least decrease, therefore according to these indices could be considered as the most resistant cultivars. Manuscript profile -
Open Access Article
47 - Some physiological responses of two wheat cultivars to foliar application of salicylic acid under drought stress
Fershteh Darabi Rahim Naseri Amir Mirzaei meysam moradiTo investigate the responses of some physiological parameters of two wheat cultivars to Salicylic acid under variable moisture condition, an Split split plot experiment was conducted in a randomized complete block design with four replications at Agricultural Research C MoreTo investigate the responses of some physiological parameters of two wheat cultivars to Salicylic acid under variable moisture condition, an Split split plot experiment was conducted in a randomized complete block design with four replications at Agricultural Research Center of Sarableh, Ilam during 2014-2015 cropping season. Experimental factors included Moisture treatments in three levels (control (100), 70 and 40 % Field capacity) In the main plots, Salicylic acid in three levels (0, 50 and 100 µM) in the sub plot and two wheat cultivar (Bahar and Pishtaz) in sub sub plot. Studied traits in this study included yield, Relative Water Content, Stomatal conductance, Rubisco activity, Photosynthetic rate, Transpiration rate, Electrolyte leakage and Sub stomatal CO2 concentration. The results showed that Triple interaction between drought stress, salicylic acid and Cultivars on all traits was significant. Although By increasing drought stress yield and Relative Water Content was significantly decreased, while the use of salicylic acid in this situation improve these traits. Also by increasing drought stress Electrolyte leakage were decreased, but the use of salicylic acid improved that. Photosynthetic rate and Rubisco activity By increasing salicylic acid Decreased In comparison with control. In general, given the role of salicylic acid in reducing the negative impact of stress on some physiological processes that studied in this research, its application in drought conditions is advisable. Manuscript profile -
Open Access Article
48 - Effect of Drought Stress, Different Levels of Nitrogen and Potassium Fertilizer on Some Physiological and Agronomical Traits of Maize hybrid (Zea mays L. CV. Single cross 704)
Reza Rezaei Sokht-Abandani Seyed Ata Siadat Alireza pazoki shahram lack mani mojddamAbstract:In order to study the effect of drought stress, different levels of nitrogen and potassium fertilizers on the growth of corn this research were done at the agricultural research center of biokola (Neka) during two years 2015 and 2016. The experiment was conduct MoreAbstract:In order to study the effect of drought stress, different levels of nitrogen and potassium fertilizers on the growth of corn this research were done at the agricultural research center of biokola (Neka) during two years 2015 and 2016. The experiment was conducted as split factorial in a completely randomized block design with three replications on S.C704. The main factor was 4 levels of drought stress (irrigation after 75, 100, 125 and 150 millimeter evaporation from class A evaporation pan) and the sub-factor three levels of nitrogen (80, 160 and 240 kg.ha-1) and three levels of potassium (75, 150 and 225 kg.ha-1) were considered.The mean comparison results showed that with increasing nitrogen and potassium consumption, the harvest index decreased by 30.52%. Also, the lowest nitrogen removal index under the interaction of irrigation × nitrogen irrigation intervals with irrigation intervals of 150 mm evaporation from class an evaporation 240 kg N/ha decreased by 30.91%.The highest relative leaf water content and leaf chlorophyll content were obtained for irrigation intervals of 75 mm with kg.N.ha-1, 94.12% and 61.59%, respectively.Also, the highest grain and nitrogen yield were obtained for the second year in 75 mm irrigation interval and 240 kg.N.ha-1 with average 12807 kg/ha and 2.72%, respectively. So after increasing in drought stress, nitrogen and potassium, the traits as harvest index and nitrogen removal index decreased. Manuscript profile -
Open Access Article
49 - Study the effect of methanol and ascorbic acid foliar application on yield and physiological traits related to water relationships peanut under rainfed condition
Maral Moradi tochaee Saeid Saifzadeh Hamid Reza Zakerin Seyed Alireza ValadabadiIn order to investigate the effect of foliar application of methanol and ascorbic acid on growth and yield of peanut (varNC2) in during 2015 year, an experiment was carried out in two locations of Astaneh Ashrafiyeh and Kiashahr. A randomized complete block design with MoreIn order to investigate the effect of foliar application of methanol and ascorbic acid on growth and yield of peanut (varNC2) in during 2015 year, an experiment was carried out in two locations of Astaneh Ashrafiyeh and Kiashahr. A randomized complete block design with three replications on a factorial experiment with two factors including four levels of methanol include 0 (Control), 7, 14, and 21 volumetric percentage and four levels of ascorbic acid include (0 Control), 250, 500, and 750 mg/lit was used. Methanol and ascorbic acid foliar applications were done two times during the growing season with 15 days intervals and spraying started in 72 code stage of BBCH-scale. Measured traits in this experiment were consisted of: pod yield, seed yield, biological yield, protein yield, oil yield, pod water use efficiency, chlorophyll, leaf relative water content and leaf osmotic potential. The results showed the simple effects of methanol and ascorbic acid foliar applications on measured traits were positive significant. The maximum amount on measured traits were observed by two foliar application of methanol treatments (14 and 21 % (v/v)) and two foliar application of ascorbic acid treatments (500 and 750 mg/l) during experiment. In comparison to the control (without foliar application methanol), methanol application at 14 and 21 % v/v levels increased seed yield up to 20.15% and 24.65% respectively. The 17.36% and 20.67% amount of seed yield increase at 500 and 750 mg/l of ascorbic acid application respectively, in comparison to the control (without foliar application ascorbic acid). Manuscript profile -
Open Access Article
50 - Effect of super absorbent polymer on drought tolerance in lantana (Lantana camara)
mehdi shahbazi abdolreza jafariLack of water resources and drought stress is the most important problems in the green spaces in arid and semi-arid regions. The use of some additives, such as super adsorbents, can help maintain and store moisture in the soil and make optimal use of limited water resou MoreLack of water resources and drought stress is the most important problems in the green spaces in arid and semi-arid regions. The use of some additives, such as super adsorbents, can help maintain and store moisture in the soil and make optimal use of limited water resources. In this research, the effect of four levels of Igeta Green-P (0, 3, 6 and 9 g / kg) and three irrigation intervals (5, 10 and 15 days) on growth indices and RWC , proline and chlorophyll index of verbena were investigated. The results of this study indicate that using super absorbent due to the moisture content in the root zone and, consequently, increasing the plant water utilization, provide better conditions for plant growth and development, especially under drought stress conditions. Application of super adsorbant Igita with concentrations of 6 and 9 g / kg improved vegetative growth and also improved RWC of the plant under irrigation conditions at intervals of 10 and 15 days. Increasing the irrigation interval from 5 days to 10 and 15 days caused the growth of the plant to decrease in terms of length and weight of the shoot, length and root weight, reduce the relative water content. Considering the positive effects of Igeta super adsorbent on the establishment and enhancement of growth of Pseudo and Peculiar seedlings, it can be concluded that the use of superabsorbent as a successful method for maintaining moisture in arid and semi-arid regions has suggested. Increased water use efficiency in the greenery. Manuscript profile -
Open Access Article
51 - Physiological responses of sweet corn under water deficit and nitrogen rates at different growth stages
A. Shahriari A.B. Puteh A.B. Abdul Rahim G.B. SalehWater deficit is one of the main factors limiting production in arid and semiarid regions. This study was carried out to investigate the effect of the interaction of water deficit and N fertilizer rate on relative water content, proline content, leaf chlorophyll c MoreWater deficit is one of the main factors limiting production in arid and semiarid regions. This study was carried out to investigate the effect of the interaction of water deficit and N fertilizer rate on relative water content, proline content, leaf chlorophyll content, pollen number and pollen viability, photosynthesis rate and stomata conductance parameters in two hybrid sweet corn ( 968 and 926) in greenhouse condition. The experimental layout was split plot factorial design arranged in a randomized complete block design with three replications in 2010 in the Agriculture Crop Science, Putra University Malaysia (UPM). Treatments consisted of four levels of irrigation (including irrigating all the growing season (control), vegetative drought, reproductive drought and vegetative and reproductive drought), three levels of Nitrogen as urea (40, 120 and 200 kg ha-1) and two varieties of sweet corn varieties (including hybrids 968 and 926), respectively. Results showed that the interaction effects of water deficit and Nitrogen fertilizer were significant and reduced leaf chlorophyll content, photosynthetic rate and stomata conductivity under water and Nitrogen rate deficit. Also the results showed that water deficit at vegetative and productive growth stages reduced photosynthesis rate compared to normal irrigation by 54% and 84%, respectively. But Nitrogen treatments at 200 and 120 kg ha-1 did not show any significant decrease in stomata conductivity. Whereas. Proline content increased under water deficit. Pollen number reduced with water and nitrogen deficit. Pollen viability reduced only under water deficit by 39%. Manuscript profile -
Open Access Article
52 - Response of Pistachio (Pistacia vera L.) Seedling Rootstocks to Salicylic Acid Foliar Application under Water Stress
Mostafa Ghasemi Kazem Arzani Abbas Yadollahi Hossein Hokmabadi Majid Agha-Alikhani -
Open Access Article
53 - Physiological, Biochemical, and Developmental Responses of some Pistachio Genotypes under Drought Stress
Mostafa Ghasemi Shiva Ghasemi Mehdi Mohammadi-Moghadam Saeid Kashanizadeh Mansoore ShamiliPistachio is one of the economic nut fruits in Iran. Water limitation is the most restrictive factor for its production. To overcome the water scarcity crisis, introducing drought-tolerant rootstocks is among the crucial breeding strategies. To investigate the drought t MorePistachio is one of the economic nut fruits in Iran. Water limitation is the most restrictive factor for its production. To overcome the water scarcity crisis, introducing drought-tolerant rootstocks is among the crucial breeding strategies. To investigate the drought tolerance of five Qazvin native pistachio genotypes, an experiment was carried out as a factorial experiment in a completely randomized design with four replications in the greenhouse conditions. The factors were pistachio genotypes (Madari, KalKhandan, Kalehbozi, Sefid, and Ghermez) and irrigation regime (normal conditions and drought stress). The highest relative water content under drought irrigation conditions belonged to the Sefid (59.99%), and Ghermez (59.09%) genotypes. The lowest value (54.68%) belonged to the Madari genotype. The highest electrolyte leakage under drought irrigation conditions belonged to the Madari genotype (55.75%). The lowest electrolyte leakage (42.44%) belonged to the Sefid genotype. Under drought stress, the highest amount of chlorophyll a (2.12 mg g-1 fresh weight), total chlorophyll (3.051 mg g-1 fresh weight), and carotenoid (2.38 mg g-1 fresh weight) was observed in Ghermez genotype. In contrast, the highest amount of chlorophyll b (1.34 mg g-1 fresh weight) was observed in the Sefid genotype. The lowest amounts of chlorophyll and carotenoid in the drought stress belonged to the Madari genotype. According to the results, the Ghermez and Sefid genotypes with lower electrolyte leakage and higher relative water content, chlorophyll, carotenoid, and biomass under water stress, were the more drought-tolerant genotypes. Madari and KalKhandan genotypes with higher electrolyte leakage and lower relative leaf water content, chlorophyll, and biomass were the most drought-sensitive genotypes. Manuscript profile -
Open Access Article
54 - Screening of Almond Hybrids for Drought Tolerance Using some Morphological and Physiological Traits
Arvin Abdini Ali Imani Mousa Rasouli Mehrshad Zinalabdini Vahid Abdoosi -
Open Access Article
55 - Allelopathic Effects of Sorghum on Milk Thistle (Silybum marianum L.) Seed Germination and Growth
HOSSEIN MOKHTARI KARCHEGANI SEYEDEH ZAHRA HOSSEINI CICI SEYED ABDOLREZA KAZEMEINI -
Open Access Article
56 - Effect of Trinexapac-Ethyl Growth Inhibitor and Drought Stress on Some Morpho-Physiological Traits of Wheatgrass (Agropyron cristatum L.)
Hengameh Vakili Ramezan Hossein Ali Asadi-Gharneh Nematollah Etemadi -
Open Access Article
57 - the expression effects of drought Stress on growth and physiological characteristics of wild and agronomy wheat genotypes
nafiseh mahdinezhad Homeyra ShahiIn order to study The Effects of drought Stress in response of wheat cultivars and wild genotype, a factorial experiment was carried out in completely randomized design in pot with three replications at 2017-2018 years. The wheat cultivars including (Bolani, behrang, sh MoreIn order to study The Effects of drought Stress in response of wheat cultivars and wild genotype, a factorial experiment was carried out in completely randomized design in pot with three replications at 2017-2018 years. The wheat cultivars including (Bolani, behrang, shabrang, sistan) and wild (urartu, tauschii, speltoides) were as the first factor and irrigation treatment with three levels consisted of normal (80% of water holding capacity of soil), mild stress (60%) and severe stress (40%) was as the second factor. Physiological studies include: chlorophyll a and b, total chlorophyll, carotenoids, Water Use Efficiency, Leaf Relative water content and the was morphological: dry matter production (dry weight of plants), stem dry weight, stem fresh weight, Root dry weight, Root fresh weight, stem length and Rott length. Analysis of variance showed that simple effect of drought stress had a significant effect on the traits chlorophyll a and b, total, carotenoids, stem dry weight, plant dry weight of plant , leaf relative water contwnt, water use efficiency and also on stem length, stem fresh weight characteristics and Root dry weight. The result of the mean comparison showed that the tolerant cultivaers had the highest stem fresh weight, plant dry weight of plant, Leaf Relative water content and Water Use Efficiency. Comparison of cultivars and wild: cultiwars of Bolani and tauschii wild life showed more resistance. Manuscript profile -
Open Access Article
58 - Evaluation of germination and some morphophysiological traits of Prosopis farcta (Banks & Sol.) under salinity stress
Azam Jamshidizadeh Masuomeh Farzaneh Afrasiab Rahnama ghahfarokhi Fatemeh NasernakhaeiIn order to investigate the germination and growth characteristics of Prosopis farcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20 MoreIn order to investigate the germination and growth characteristics of Prosopis farcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20, 25, 30, 35 and 40 dS/m-1 concentrations) with four replications in lab. Seedling experiment was performed in a random complete block design consisted of five levels of concentration (tap water, 10, 20, 30 and 40 dS/m-1) with three replications as pot in non-shade greenhouse of Agricultural College of Shahid Chamran University of Ahvaz. The results showed that by rising salt to 20 dS/m-1, declined percentage germination, Radicle length, Plumule length and seedling dry weight about 50%. Salinity stress data were fitted to a three-parameter logistic for seedling stage, showed salinity level more than 30.82 dS/m-1 led to 50 percent reduction of shoot dry weight. It found that 20.37 and 27.53 dS/m-1 caused a 50% decrease in dry weight and long of main root recpectively. Sustainment 50% of the relative water content of the leaf and 78% root branches in high salinity levels (50 dS/m-1) can be sign of high tolerance to this plant at high salinity concentrations. Manuscript profile -
Open Access Article
59 - Evaluation of germination and some morph physiological traits of Prosopisfarcta (Banks & Sol.) under salinity stress
Azam Jamshidizadeh masoumeh Farzaneh afrasiab Rahnama ghahfarokhi fatemeh NasernakhaeiIn order to investigate the germination and growth characteristics of Prosopisfarcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20, MoreIn order to investigate the germination and growth characteristics of Prosopisfarcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20, 25, 30, 35 and 40 dS.m-1 concentrations) with four replications in lab. Seedling experiment was performed in a random complete block design consisted of five levels of concentration (tap water, 10, 20, 30 and 40 dS.m-1) with three replications as pot in non-shade greenhouse of Agricultural College of ShahidChamran University of Ahvaz.The results showed that by rising salt to 20 dS.m-1, declined percentage germination, Radicle length, Plumule length and seedling dry weight about 50%. Salinity stress data were fitted to a three-parameter logistic for seedling stage, showed salinity level more than 30.82 dS/m-1 led to 50 percent reduction of shoot dry weight. It found that 20.37 and 27.53 dS.m-1 caused a 50% decrease in dry weight and long of main root recpectively. Sustainment 50% of the relative water content of the leaf and 78% root branches in high salinity levels (50 dS.m-1) can be sign of high tolerance to this plant at high salinity concentrations. Manuscript profile -
Open Access Article
60 - Evaluation of germination and some morph physiological traits of Prosopisfarcta (Banks & Sol.) under salinity stress.
faizallah Khalaj Mohammad Nasri farshad Ghoshchi hamidreza TohidiMoghadam pourang KasraeiIn order to investigate the germination and growth characteristics of Prosopisfarcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20, MoreIn order to investigate the germination and growth characteristics of Prosopisfarcta two experiments were conducted separately, under salinity stress. Germination experiment was done in a completely randomized design with 9 levels of salinity stresses (0, 5, 10, 15, 20, 25, 30, 35 and 40 dS.m-1 concentrations) with four replications in lab. Seedling experiment was performed in a random complete block design consisted of five levels of concentration (tap water, 10, 20, 30 and 40 dS.m-1) with three replications as pot in non-shade greenhouse of Agricultural College of ShahidChamran University of Ahvaz.The results showed that by rising salt to 20 dS.m-1, declined percentage germination, Radicle length, Plumule length and seedling dry weight about 50%. Salinity stress data were fitted to a three-parameter logistic for seedling stage, showed salinity level more than 30.82 dS/m-1 led to 50 percent reduction of shoot dry weight. It found that 20.37 and 27.53 dS.m-1 caused a 50% decrease in dry weight and long of main root recpectively. Sustainment 50% of the relative water content of the leaf and 78% root branches in high salinity levels (50 dS.m-1) can be sign of high tolerance to this plant at high salinity concentrations. Manuscript profile -
Open Access Article
61 - Effect of defoliation and on morphophysiological characteristics under drought stress condition in Sorghum (Sorghum bicolor L.)
Mohsen Porahmadi Rahim Honarnejad meysam oveysiIn order to investigate effect of drought stress and defoliation on sorghum an experiment were conducted in form of split plot based on randomized complete block design with four replications at field of Islamic Azad University, Varamin branch in 2011. Treatments are in MoreIn order to investigate effect of drought stress and defoliation on sorghum an experiment were conducted in form of split plot based on randomized complete block design with four replications at field of Islamic Azad University, Varamin branch in 2011. Treatments are include drought stress in three levels (irrigation after 50, 90 and 130 mm evaporation from pan class A) and defoliation in three level (Control, Defoliation 33 and 66). The results showed that drought stress had significant effect on leaf area at floury stage, Biological yield, grain yield, harvest index, lead fresh and dry weight at flowering stage, stem fresh weight at flowering stage, leaf dry weight at floury stage, stem fresh and dry weight at floury stage, flower dry weight at floury stage, stem length at floury stage, thousand seed weight, panicle length at floury stage, stem diameter, dry weight at physiologic maturity. Defoliation showed significant difference on leaf area at flowering and floury stage, biologic yield, grain yield, harvest index, flower fresh and dry weight at flowering stage, stem dry weight at flowering stage leaf fresh and dry weight at floury stage, stem fresh and dry weight at flowering stage, flower fresh and dry weight at floury stage, thousand seed weight, panicle length at floury stage, stem diameter, dry weight at physiologic maturity. Chlorophyll amount, EC, biological yield, panicle length at flowering and flouring stage under drought stress in contrast to normal irrigation decreased respectively 5, 36, 5, 3 and 3. By increasing in water deficit and Defoliation decreased plant morphologic and physiologic characteristics. Manuscript profile -
Open Access Article
62 - Effect of foliar application of humic acid micronutrients and cytokinin on yield and some quality traits of Italian basil (Ocimum basilicum L.) under hydroponic cultivations
Roma Kalhor. monfared Mohamad Nabi.ilkayi Farzad Paknejad One of the most important applications of nanotechnology in agriculture is the use of Nanofertilizers to feed plants to improve plant nutrition and minimize the costs of environmentalprotection, and hydroponic cultivation, due to the lack of environmental pollutio More One of the most important applications of nanotechnology in agriculture is the use of Nanofertilizers to feed plants to improve plant nutrition and minimize the costs of environmentalprotection, and hydroponic cultivation, due to the lack of environmental pollution to the soil, isa suitable method. To produce agricultural products. For this purpose, a factorial study wasconducted in the form of a complete randomized design with three replications in a greenhouselocated in Nazarabad, Karaj, on Italian basil as hydroponic cultivation. The treatments of thisexperiment include foliar application of humic acid at three levels (no consumption control ascontrol, 500, 1000 mg.l-1), foliar application of micronutrients at three levels (0, iron Nanochelate and zinc Nano chelate) and solution Spray of cytokinin hormone was at two levels (0and 100 μM). The results showed that after increasing in humic acid concentration, the yieldand quality traits of Italian basil increased and foliar application of micronutrients (iron andzinc) as well as cytokinin hormone increased the traits studied compared to the control. Humicacid 1000 mg.l-1 × Nano-chelate on × cytokinin leads to an increase of 39.99% and also theinteraction of humic acid 1000 mg/l iron Nano-chelate × cytokinin gained to 115.34% increasein plant dry weight ratio Witnessed. Manuscript profile -
Open Access Article
63 - The role of growth promoters in improvement of yield and physiological properties of Red bean under different irrigation levels
M.K. Aliloo محسن Roshdi S. Rezadoost J. Khalili Mahaleh An experiment in the form of split-plot design with randomized complete blocks was performedin three replications in Pyrmosi village of Khoi city during 1400 in order to evaluate theresponse of yield and physiological properties of red beans to the application of More An experiment in the form of split-plot design with randomized complete blocks was performedin three replications in Pyrmosi village of Khoi city during 1400 in order to evaluate theresponse of yield and physiological properties of red beans to the application of growthpromoters under different irrigation levels. Irrigation was considered as the main factor in threeirrigation levels, i.e., once in 8, 11 and 14 days, and the growth promoting compounds wereviewed as the secondary factors in 5 levels, i.e., the use of humic acid mixed with irrigationwater, amino acid foliar spraying, rooting stimulant, potassium and non-use of growthpromoters was (control). The results of analysis of variance indicated that irrigation had asignificant impact on all the traits studied, and the growth promoters affected the leaf relativewater content, chlorophyll a, protein percentage, number of lateral branches, seed yield, andharvest index significantly. The interaction of the two factors had significant effects on thenumber of lateral branches, seed yield, harvest index, and seed protein percentage. Theapplication of humic acid resulted in increased seed yield, and as the water deficit increased, theeffect of humic acid on increasing seed yield became significant. The highest seed yield was3076.12 kg per hectare observed in the irrigation level of once every 8 days and under thehumic acid treatment, and the lowest level of this trait was 1220.96 kg observed in the irrigationlevel of once 14 days and under the control treatment. It seems that increased irrigation intervalduring the growing season led to yield loss and degradation of physiological properties such asleaf area index, chlorophyll, and leaf relative water content, and the use of compounds such ashumic acid moderated the decreasing drought stress effects to some extent. Manuscript profile -
Open Access Article
64 - Physiological and biochemical response of some grape cultivars to drought stress
Mojtaba gholizadeh mehdi Haddadinejad علی عبادی Ali Mohammadi TorkashvandIn order to investigate the effect of drought stress on the physiological and biochemical traits of six grape cultivars, a factorial experiment was conducted based on a completely randomized design with three replications under greenhouse conditions. In this experiment, MoreIn order to investigate the effect of drought stress on the physiological and biochemical traits of six grape cultivars, a factorial experiment was conducted based on a completely randomized design with three replications under greenhouse conditions. In this experiment, the treatments included six Khorasani and shirazi grape varieties (Askari, Khalili, Yaquti, Pikami, Turkmen 4 and Suzak) and four levels of drought stress (normal conditions (100% of the farm capacity), low stress (75% of the farm capacity), medium stress ( 50% of farm capacity) and severe stress treatment (25% of farm capacity). The results showed that physiological and biochemical traits increased significantly with increasing stress intensity. On the other hand, the traits of relative leaf water content, membrane stability index, amount of photosynthetic pigments, and total phenol content decreased significantly with increasing stress intensity. Among the cultivars studied, the Yaqouti cultivar showed more resistance to drought than other grape cultivars in terms of the studied indices. According to the results of this research, it seems that Yaghuti cultivar is more drought tolerant than other cultivars. Since this tolerance located in leaf via active mechanisms, it is necessary to carry out additional tests when using Yaghuti as rootstock for scion of grapevine. Manuscript profile -
Open Access Article
65 - Effect of potassium and zinc on yield, yield components and some physiological traits of chickpea under rainfed condition
Amin Abbasi Moghaddam Ali Ebadi Hossein ShahbaziTo evaluate the effects of potassium on yield, yield components and some physiological traits of chickpea in rain-fed conditions, an experiment was conducted as a factorial based on randomized complete block design with three replications in Research Farm of Islamic Aza MoreTo evaluate the effects of potassium on yield, yield components and some physiological traits of chickpea in rain-fed conditions, an experiment was conducted as a factorial based on randomized complete block design with three replications in Research Farm of Islamic Azad University Ardabil Branch in 2011. Factors included four potassium levels as 0, 30, 60 and 90 kgha-1 and Zinc on three levels of 0, 0.3 and 0.6%. The traits such as yield, biological yield, harvest index, number of seeds per plant, number of pods per plant, a, b and total chlorophyll, leaf relative water content, stability of cell membrane and osmotic potential were measured. The highest biological yield, harvest index, number of seeds per plant, chlorophyll a, b and total chlorophyll and leaf relative water content, cell membrane stability and lowest osmotic potential belonged to the treatment of 90 kg ha-1 potassium and 0.6% of zinc treatment. Based on the results, it seems that application of the potassium and zinc improves stress tolerance indices and reduce stress injuries and grain yield, consequently. Manuscript profile -
Open Access Article
66 - Effect of irrigation methods and potassium fertilizer on grain yield and water use efficiency on Corn
Abdollah BahraniThe experiment was conducted in Islamic Azad University - Ramhormoz Branch in 2011, based on a complete randomized block design as split-plot with three replications on SC500 corn cultivar. The main plots consisted of three irrigation methods including full, variable, a MoreThe experiment was conducted in Islamic Azad University - Ramhormoz Branch in 2011, based on a complete randomized block design as split-plot with three replications on SC500 corn cultivar. The main plots consisted of three irrigation methods including full, variable, and fixed irrigation methods. Each subplot received three rates of potassium fertilizer as 0, 150 or 300 kg ha-1. The results showed that the plots received full irrigation resulted in significantly higher grain yield than other irrigation methods. The highest water use efficiency (1.29 kg m-3) was obtained in variable irrigation and the lowest one (1.08 kg m-3) was in full irrigation. Potassium application increased relative water content and grain protein percentage in variable irrigation and fixed irrigation than full irrigation treatment. Full and fixed irrigation treatments produced the lowest and the highest abscisic acid concentration at any potassium levels. Considering that the alternative irrigation method, whether variable or fixed, decreased used water and also increased water use efficiency, therefore using mentioned irrigation method can be a suitable method in deficit water condition and high water cost, could be better than full irrigation method in corn in this region. Manuscript profile -
Open Access Article
67 - Influence of KCl and urea spraying on quality and quantity of wheat cv. Sardari under rainfed conditions
Mehrdad AbdiIn 2012 a factorial experiment was conducted in Khodabandeh Dryland Research Station to study the effects of foliar spraying of urea, potassium chloride and urea + potassium chloride on grain yield, grain protein and leaf relative water content of Sardari wheat under ra MoreIn 2012 a factorial experiment was conducted in Khodabandeh Dryland Research Station to study the effects of foliar spraying of urea, potassium chloride and urea + potassium chloride on grain yield, grain protein and leaf relative water content of Sardari wheat under rainfed condition. Also, to determine the most effective application time of nutrients used at various growth stages including double ridge, milky and double stage + milky stage, factorial experiment had 15 treatments and arranged in a randomized block design with three replications. The amounts of urea and potassium chloride used as foliar spraying were equivalent to 20 kg/ha. The urea and potassium chloride were sprayed with concentrations of 5 and 1%, respectively. Growth preserved leaf moisture and resulted in highest leaf relative water content. Spraying potassium chloride + urea in double ridge and milky stages resulted in highest grain yield, biological yield, thousand kernel weight, number of kernel per head and grain protein content. These parameters showed 40, 9.3, 49 and 7.9% increasing comparing to the check, respectively. The overall results showed that spraying potassium chloride before anthesis stage increased grain yield and number of grain per head, while spraying after anthasis stage increased significantly protein content and thousand kernel weight. Manuscript profile -
Open Access Article
68 - Study the drought tolerance of 12 varieties of wheat (Triticum aestivum) in Shirvan area
Seyed Morteza Azimzadeh In order to study the drought tolerance of 12 varieties of wheat, an experiment was conducted in research farm of Islamic Azad University of Shirvan in the 2004-2005 growing season. The experiment was performed under two separated conditions using a r More In order to study the drought tolerance of 12 varieties of wheat, an experiment was conducted in research farm of Islamic Azad University of Shirvan in the 2004-2005 growing season. The experiment was performed under two separated conditions using a randomized complete block design with three replications. The length and width of each plot was 5 and 1.5 m, respectively. Plant density was 500 seeds per square meter in both experiments. At the early grain filling stage, leaf samples were provided from each plot to determine the leaf electrical conductivity and leaf relative water content. Number of spikes per square meter, grain weight and yield were measured after harvesting. Stress tolerance index (STI) and stress susceptibility index (SSI) were estimated according to grain yield of any variety in both dryland and irrigated conditions. The results of combined analysis showed that Chamran and Cross-Sabalan produced 2005 and 2310 kg/ha seed yield in irrigated condition, respectivaly that were higher than other varieties. In dryland condition, the yield of Chamran and Cross-Sabalan were 648 and 551 Kg/ha that were higher than other varieties, as well. Cross-Sablan and Chamran also showed higher drought tolerance index compared with other varieties. Drought tolerance index in the mentioned two varieties was 6.8 and 6.6, respectively. Cross-Sabalan also showed relatively high drought susceptibility index, but Chamran showed higher drought tolerance index and lower drought susceptibility index compared to the other varieties. According to the results, two varieties of Cross-Sablan and Chamran were advisable to plant in regions with limited source of water for irrigation. Manuscript profile
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