List of Articles محتوی آب نسبی

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  1 - 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 Hassanpanah
  This 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 More

  This 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
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  2 - اثر نیترات پتاسیم (KNo3) بر جوانه زنی و برخی ویژگی های مورفوفیزیولوژیکی ناخنک (Astragalus hamosus) در محیط کشت MS
  آزاده بخشنده فرج پور رضا دهقانی بیدگلی سید علی حسینی تفرشی
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  3 - اثر نیترات پتاسیم (KNo3) بر جوانه‌زنی و برخی ویژگی‌های مورفوفیزیولوژیک ناخنک (Astragalus hamosus) در محیط کشت MS
  آزاده بخشنده فرج‌پور رضا دهقانی بیدگلی سیدعلی حسینی تفرشی
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  4 - اثر نیترات پتاسیم (KNo3) بر جوانه‌زنی و برخی ویژگی‌های مورفوفیزیولوژیک ناخنک (Astragalus hamosus) در محیط کشت MS
  آزاده بخشنده فرج‌پور رضا دهقانی بیدگلی سیدعلی حسینی تفرشی
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  5 - Effect of Nanoparticles of Selenium (Nano-Se) and Rice bran Extract on Germination and Some Morphophysiological Characteristics of (Astragalus adscendens Boissier)
  Reza Dehghani Bidgoli
  In 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 More

  In 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
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  6 - Evaluation of effects of different Urea top-dressing methods and foliar application of selenium on wheat under rain fed condition
  Mohammad Konani Nourali Sajedi
  This 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 More

  This 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
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  7 - 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 پازکی
  In 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 More

  In 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
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  8 - 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. Mohammadkhani
  In 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 More

  In 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
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  9 - Study the physiological responses of mung bean (Vigna radiata L.) as affected by irrigation with magnetized water under drought stress
  Omid Sadeghipour
  In 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 More

  In 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
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  10 - Analyzing the effects of defoliation on physiological and biochemical characteristics of sunflower under cut irrigation.
  Farshad Ghooshchi
    Sensitivity to water deficit a few days before the heads emergence up to complete color change of grains is too much in sunflower. But the most sensitive stage to water deficit is at anthesis level. As a result, decrease in leaf area is the first reaction that a More

    Sensitivity to water deficit a few days before the heads emergence up to complete color change of grains is too much in sunflower. But the most sensitive stage to water deficit is at anthesis level. As a result, decrease in leaf area is the first reaction that a plant choose to adapt the storage of received water; this way is the most important mechanism of plant adaption to water deficit stress. In order to analyze the effects of defoliation on qualitative and quantitative characteristics of randomized complete blocks. The main plot was designed at four levels including the normal irrigation (S1), no irrigation from floret to flowering (S2), no irrigation from flowering to first stage o grain filling (S3), and no irrigation from first stages of grain filling to physiological maturity (S4). And the sub plot was designed at three level of on defoliation (F1), 25% defoliation (F2), and 50% defoliation. The results indicated that the main effect of no irrigation was significant an all factors under study including grain yield , biological yield , oil content, cytoplasm membrane resistance , Relative water content (RWC) , total chlorophyll, and proline. The main effect of defoliation was significant on all factors except for grain yield and biological yield. But, the interaction effect of no irrigation stress and defoliation was not significant on the factors under study. No irrigation at flowering to grain filling could decrease the grain yield to 44% comparing the normal irrigation. Also, under the same condition, the amount of proline increased significantly and reached 56.8 m mol / g; that is 49% more than normal irrigation condition. Moreover, 50% defoliation could increase the total chlorophyll and RWC significantly.   Manuscript profile