Investigation of nano-chelated potassium effects on morphological and physiological characteristics of the Soybean (Glycine max L.) under drought stress

Maghboul, Parisa and Ghasemian, Alireza and Jahanbakhsh, Sodabeh and Razavi, Seyed Mahdi and Asadi, Asadollah (2015) Investigation of nano-chelated potassium effects on morphological and physiological characteristics of the Soybean (Glycine max L.) under drought stress. Masters thesis, University of Mohaghegh Ardabili.

Text (بررسی اثرات نانو کلات پتاسیم بر خصوصیات مورفولوژیکی و فیزیولوژیکی گیاه سویا (.Glycine max L) تحت تنش خشکی) Parisa Maghboul.pdf Download (1MB)

Abstract

Soybean is one of the most important oilseed and protein-rich. and drought is the most important factor limiting plant growth. And given that the potassium role in the vital activity of the plant and prevent the devastating effects of the drought. The aim of this study was to investigate the impact of nano- chelated potassium on drought tolerance in soybean. For this purpose the effect of nano- chelated potassium on drought tolerance in soybean plant Multifactorial experiment was conducted in a completely randomized design, The experiment consisted of three levels of drought stress (0, -4 and -8 Bar), three levels of foliar application of chelated potassium (0, 35 and 65 mg per liter) and two soybean varieties (cultivars Williams and L17) in three replicates. Stress was conducted at 3 and 5 leaves. The first sample within 5 days after exposure to plant the stress caused by polyethylene glycol 6000 and at the same time the leaves were sprayed nano- chelated potassium. The results showed that The stress and nano- chelated potassium on both physiological parameters (membrane stability, relative water content, proline, etc) and morphology (length of stem and root, root dry weight and shoot) affected. overall antioxidant enzyme activities increased under drought stress and use of nano-chelated potassium improve the effects of drought and reduction These traits changes in stress. Stress also cause reduces the photosynthetic capacity , which reduces plant height and dry weight. Stress reduces membrane stability and relative water content in both Williams and L17 cultivars, and the use of nano-chelated potassium by Reduce the damaging effects of stress was Improved the soybean cultivars. also Drought stress was increases the amount of leaves protein in L17 cultivar. The cultivars used in this study L17 variety compared to WilliamsThe cultivars used in this study compared to Williams L17 variety was more tolerant to stress that this tolerance through higher productivity metabolites especially proline and high activity of catalase is in this cultivar. It was also observed using nano-chelated potassium reduces stress effects and different concentrations used in concentrations of 35 mg per liter can the proper treatment be effectiveness and is recommended for farmers. Keywords: Soybean, physiological parameters, morphological parameters, nano-chelated potassium, drought stress

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