To study the response of sesame plant under water deficit condition to the management methods, a factorial split experiment using a randomized complete block design with three replications was conducted at the Jiroft Agricultural and Natural Resources Research and Educa More
To study the response of sesame plant under water deficit condition to the management methods, a factorial split experiment using a randomized complete block design with three replications was conducted at the Jiroft Agricultural and Natural Resources Research and Education Center in 2015. Irrigation treatments were soil field capacity, permanent wilting point, root development depth and percent availability water to sesame (with four levels: 100, 80, 60 and 40% of the required water). Ecotypes used, were Halil, Borazjan 2 and local population of Jiraft. In this experiment, wheat straw mulch used with two levels: (without using mulch and using 7.5 tons of mulch per hectare). The results showed that simple effects of drought stress and mulch and the interaction of drought stress × mulch on all measured traits were significant at the probability level of 1%. The interaction of drought stress × ecotypes × mulch was significant only for number of branches and oil percentage. The highest and lowest seed yield and oil percentage were belonged to Haleil and Borazjan 2 ecotypes, respectively. Use of 7.5 tons straw mulch per hectare resulted in improving the means of measured traits as compared to that of control. The highest percentage of oil was obtained from Halil ecotype by using straw mulch and irrigation level of 100% (53.10%), but its difference with irrigation level of 80% (52.9%) was not significant. In general, the results showed that the using of straw mulch of wheat reduced positively the effects of water deficits.
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Based on the increasing literatures on medicinal plants and their importance in the food and pharmaceutical industries, the present study was designed to study on the medicinal plant Physorrhynchus chamaerapistrum. Silica (Si) is known as a beneficial element for many p More
Based on the increasing literatures on medicinal plants and their importance in the food and pharmaceutical industries, the present study was designed to study on the medicinal plant Physorrhynchus chamaerapistrum. Silica (Si) is known as a beneficial element for many plant species. In the present study was designed to study on the effect of potassium silicate treatment on some physiological traits of P. chamaerapistrumare. In this order, foliar application of 10 and 20 mM potassium silicate and distilled water (as control plant) was applied on P. chamaerapistrumare in their natural habitat in Behbahan. After one month, the leaves of the plants were harvested to investigate the physiological responses of the plants to the potassium silicate treatment. Based on the results, Silica treatment had not significant effect on the leaf fluorescence indices, while it significantly increased photosynthetic pigments in P. chamaerapistrumare. Silica treatment did not show a significant effect on the efficiency of photosystem II (Fv / Fm) and the efficiency of both photosystems I and II (PIABS). The levels of chlorophyll a, b and total and carotenoids in silica-treated plants showed a significant increase in Silica treatment, while they did not show any differences between 10 and 20 mM of potassium silicate. The results of the present study acclaimed that silica as an unnecessary mineral element for plant can improve the photosynthetic pigments contents in plants
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In this research, the Halodule uninervis sea grass was collected in the tidal area of Golshahr (Bandarabaas-Iran) in maximum period of ebb in summer-autumn- winter 88 to spring 89. The physiological analysis of Halodule uninervis was performed three times by measuring P More
In this research, the Halodule uninervis sea grass was collected in the tidal area of Golshahr (Bandarabaas-Iran) in maximum period of ebb in summer-autumn- winter 88 to spring 89. The physiological analysis of Halodule uninervis was performed three times by measuring Photosynthetic pigments (Chlorophylls a, b and Carotenoids) and the amount of Prolinewas also investigated. The results indicated that the minimum amount of Chlorophyll a was found in spring (1/19 ± 0/002 mg/g) and the minimum amount of Chlorophyll b (0/68 ± 0/003 and 0.68 ± 0/003 mg/g) and Carotenoids (1/25 ± 0/002 and 1/26 ± 0.002 mg/g) was found in autumn and winter respectively. The Proline measurement revealed that the amount of Proline in roots was less in comparison to the leaves and the minimum amount of Proline found in roots was in spring (0/07 ±0/006 mg/g) and summer ( 0/08 ± 0.004 mg/g).
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Rocket (Eruca sativa MILL.) with high biological and morphological diversity, is an important plant because of health promoting agents and consumption in medical, industrial and economic. It can grow in areas where rainfall and soil fertility are low with drought and sa More
Rocket (Eruca sativa MILL.) with high biological and morphological diversity, is an important plant because of health promoting agents and consumption in medical, industrial and economic. It can grow in areas where rainfall and soil fertility are low with drought and salt tolerant characteristic. In this research, for screening the salt tolerant plants, 3-4 leaves plants were cultivated in pots in three replications and were treated by different amounts of salt (NaCl) in three phases by 15-day intervals. After each salt treatment, the morphology of remaining plants was studied. The results revealed that the remaining salt tolerant plants had numerous cuts in leaves and short fuzzy fruits. To study the biochemical changes in each salt treatment, the total phenol and photosynthetic pigments of plant parts of each treatment were measured. The phenol content of treated plants decreased considerably with increase of salt. Photosynthetic pigments were chlorophyll a, b and carotenoids and the results showed that with the salt increase, the amount of pigments did not change. Tolerant plants have cutoff leaves and short fuzzy fruits. In general, salt resistant plants or remained plants are cutoff leaves with short fuzzy fruits plants that their phenol content decreased, but photosynthetic pigments did not change by increasing of salt.
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