Mehrab Mehri Charvadeh; Hamid Reza Zakerin; Marefat Mostafavi Rad; Saeed Sayfzadeh; alireza valadabadi
Abstract
In order to evaluate peanut (Arachis hypogaea L.) NC2 variety growth as affected by supplementary irrigation and Salicylic acid, this experiment was performed as split plat based on randomized complete block design with three replications in experimental field of Agicutural and Natural Resources Research ...
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In order to evaluate peanut (Arachis hypogaea L.) NC2 variety growth as affected by supplementary irrigation and Salicylic acid, this experiment was performed as split plat based on randomized complete block design with three replications in experimental field of Agicutural and Natural Resources Research and Education Center of Guilan Province (Kanroud research station of Astara), Iran, during 2018 and 2019 cropping seasons. Four level of irrigation regimes: no irrigation (rainfed condition), supplementary irrigation at initial flowering stage, supplementary irrigation at pod formation stage and supplementary irrigation at initial flowering + pod formation stages and three levels of salicylic acid (SA): 100, 200 and 300 µmol/l comprised experimental treatments, as main and sub plot, respectively. Drought stress dercreased all measured characteristics in peanut and foliar application of SA at the rate of 300 µmol/l improved all studied characteristics under bath supplementary irrigation and rainfed condition. The greatest pods number per plant (51.57), grain yield (3450 kg/ha) and pod yield (4958 kg/ha) of peanut were obtained under supplementary irrigation at initial flowering + pod formation stages with SA and these agronomic traits increased 38.79, 70.8 and 57.6 percent compared to rainfed comdition, respectively. Results of this reaserch indicated, supplementary irrigation and foliar application of SA at the rate of 300 µmol/l could be recommendable to enhance plant growth and grain yield of peanut under similar climatic condition.
Atefeh Sadat Mousavi; Masoumeh Naeemi; ali Rahemi karizaki; Abdolatif Gholizadeh
Abstract
In order to investigate the effect of chitosan and salicylic acid elicitors on osmotic adjustment and some physiological traits of Hyssop under experimental drought conditions, an experiment has been carried out as a split plot design with randomized complete block design with three replications at research ...
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In order to investigate the effect of chitosan and salicylic acid elicitors on osmotic adjustment and some physiological traits of Hyssop under experimental drought conditions, an experiment has been carried out as a split plot design with randomized complete block design with three replications at research farm of Gonbad Kavous University during 2018-2019. Irrigation factor at three levels include 7, 14, and 21 days irrigation interval as main factor and four levels of spraying including no elicitor (control treatment, spraying), salicylic acid (300 mg. l-1), Chitosan spraying (5 g. l-1), and combination of salicylic acid and chitosan, considered as auxiliary agents. Results of analysis of variance show that the interaction between spraying and irrigation has had significant effects on ion leakage, chlorophyll a content, soluble sugar, and malondialdehyde content but insignificant impacts on carotenoid and essential oil yield. Spraying of salicylic acid, with 17% reduction in ion leakage and 40% reduction in plant malondialdehyde, compared to the control, increase the stability of cell membranes under 21-day irrigation stress. In the same treatment, chitosan has increased the amount of photosynthetic pigments and total chlorophyll by 51%, compared to the control. According to the results, salicylic acid and Chitosan have been able to increase the ability of hyssop in response to water deficit stress by activating different tolerance mechanisms.