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- 저자 : Safia MA Ahmed (검색결과 1 건)
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Response of Wheat Growth and Productivity to Exogenous Polyamines under Lead Stress
Mostafa M Rady,Mohamed A Seif El-Yazal,Hanan AA Taie,Safia MA Ahmed 한국작물학회 2016 Journal of crop science and biotechnology Vol.19 No.5
Polyamines [i.e. spermine (Spm), spermidine (Spd) and putrescine (Put)] antagonistic effects on stress imposed by 2.0 mM lead (Pb 2+ ) on growth, yield and its components and changes in the osmoprotectant and endogenous Pb 2+ concentrations, the contents of some nutrients and tissue health in wheat plants were evaluated. Under the three applied polyamine (PAs) applications, the efficiency of wheat plants to tolerate Pb 2+ stress in terms of growth and yield characteristics was noticed to varying degrees. The enhancements in osmoprotectant concentrations and plant health [in terms of relative water content (RWC) and membrane stability index (MSI)], and reductions in electrolyte leakage (EL) and plant Pb 2+ concentration were correlated with the reasonable growth of Pb 2+ -stressed plants and their grain yield. Results point out that, better growth and yield characteristics, MSI, RWC, leaf photosynthetic pigment and osmoprotectant concentrations, and nutrient contents were obtained with seed soaking in 0.25 mM Spm, 0.50 mM Spd or 1.0 mM Put than those generated with seed soaking in water under 2.0 mM Pb 2+ stress. In contrast, EL and the concentration of endogenous Pb 2+ were significantly reduced. However, the Pb 2+ -free control positively exceeded the all stressed treatments. Among all tested PAs, 1.0 mM Put showed the best results and thus is recommended, as seed soaking, for wheat to grow well under Pb 2+ stress.
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