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Physiological Responses of Pak Choi to Exogenous Foliar Salicylic Acid Under Soil Se Stress

文献类型： 外文期刊

作者： Chen, Jinping 1 ; Huang, Taiqing 1 ; Zeng, Chengcheng 1 ; Xing, Ying 1 ; Pan, Liping 1 ; Liao, Qing 1 ; Liang, Panxia; 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Agr Resources & Environm Res Inst, Nanning 530007, Guangxi, Peoples R China

2.Guangxi Selenium Rich Agr Res Ctr, Nanning 530007, Guangxi, Peoples R China

3.Guangxi Selenium Rich Agr Prod Engn Technol Res C, Nanning 530007, Guangxi, Peoples R China

关键词： Selenium stress; Selenium biofortification; Toxicity; Chlorophyll fluorescence

期刊名称：WATER AIR AND SOIL POLLUTION （ 影响因子：2.52； 五年影响因子：2.574 ）

ISSN： 0049-6979

年卷期： 2021 年 232 卷 9 期

页码：

收录情况： SCI

摘要： In plants, excess selenium causes general toxic symptoms. However, salicylic acid plays an important role in alleviating toxic effects of various stresses. This study aimed to clarify the role of exogenous foliar salicylic acid on alleviating selenium toxicity of pak choi exposed to moderately and highly Se-excessive soils (4 mg center dot kg(-1) Se and 10 mg center dot kg(-1) Se, respectively). The results showed that Se stress caused severe lipid peroxidation, desynchronization of the antioxidant enzymatic system, and significant decreases in the measures of photosynthetic activity and shoot biomass. Under Se stress conditions, exogenous foliar salicylic acid significantly increased measures of photosynthetic activity and shoot biomass, increased catalase activity, and decreased measures of oxidative stress. Moreover, exogenous salicylic acid significantly enhanced Se accumulation in shoots under Se stress conditions. We demonstrate here that foliar spraying with salicylic acid is an effective measure to alleviate the adverse effects of Se stress and enhance Se accumulation for optimizing crop Se biofortification in Se-excessive soil.

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