Silicon Attenuates Acidic and Alkaline Stress in Wheat Plant by Improving Nutrient Availability, Membrane Stability Index and Antioxidant Defense System

文献类型： 外文期刊

第一作者： Shafeeq-ur-Rahman

作者： Shafeeq-ur-Rahman;Qi Xuebin;Zhao, Zhijuan;Cui Jiaxin;Mehmood, Faisal;Shafeeq-ur-Rahman;Qi Xuebin;Zhao, Zhijuan;Cui Jiaxin;Mehmood, Faisal;Ashraf, Muhammad Nadeem;Aziz, Tariq;Hafeez-ur-Rahman;Saeed-ur-Rahman

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关键词： Physiological traits; Oxidative stress; Reactive oxygen species; Lipid peroxidation; Membrane leakage

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2020 年 24 卷 3 期

页码：

收录情况： SCI

摘要： The defending role of silicon in relation to growth, leaf area, plant total biomass, photosynthetic pigments, lipid peroxidation, membrane characteristics and stability index (%), membrane leakage, macro and microelement availability, as well as enzymatic and non-enzymatic antioxidants contents, were assessed under acidic and alkaline stresses in wheat plants grown hydroponically. For this purpose, we used 9 treatments with three levels of Si (0, 1, and 3 mmol L-1) in the form of Na2SiO3 against three levels of pH (5, 7 and 9). Results showed that acidic, as well as alkaline stresses significantly reduced plant physiological traits and photosynthetic rates by creating deficiencies accompanied by toxicities of various macro and microelements. Moreover, acidic and alkaline stresses reduced membrane stability through lipid peroxidation measured as malondialdehyde contents, enhanced membrane injury and induced oxidative stress through H2O2 contents, and triggers enzymatic and non-enzymatic antioxidative defense system through oxidative burst comparing with control (pH 7). While the addition of Si at the concentrations of 1 and 3 mmol L-1 significantly encountered adverse effects of acidic and alkaline pH through further strengthening the antioxidant defense system by enhancing the activities of enzymatic and non-enzymatic antioxidants and suppressing reactive oxygen species (ROS) contents. In conclusion, Si application, as a non-corrosive beneficial element, enhanced wheat tolerance in acidic and alkaline induced oxidative stress by regulating the membrane characteristics and by improving the antioxidant defense system. (C) 2020 Friends Science Publishers

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