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Application of exogenous jasmonic acid enhances the resistance of pak choi (Brassica chinensis L.) to high levels of selenium-toxicity in the soil

文献类型： 外文期刊

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

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

2.Guangxi Key Lab Arable Land Conservat, Nanning 530007, Guangxi, Peoples R China

关键词： Selenium toxicity; Metabolites in the rhizosphere; Secondary metabolites; Chlorophyll fluorescence

期刊名称：PLANT AND SOIL （ 影响因子：4.1； 五年影响因子：4.7 ）

ISSN： 0032-079X

年卷期： 2025 年 511 卷 1-2 期

页码：

收录情况： SCI

摘要： Background and aims Enhancing selenium (Se) accumulation in crops is an important way to overcome human Se deficiency. However, increasing the Se content in the soil can produce toxic effects in crops. This study aimed to clarify the role of exogenous foliar jasmonic acid (JA) on alleviating Se toxicity of pak choi exposed to high levels of Se-toxicity in the soil. Methods Pak choi were exposed to high levels of soil Se stress and evaluate the physiological response, variation of Se accumulation and metabolites in the rhizosphere of plants treated with JA compared to those untreated under soil Se stress. Results Se stress severely inhibited pak choi growth and biomass accumulation by reducing their photosynthetic capacity of photosystem II and inducing a heavy lipid peroxidation. When plants were sprayed with JA, 23.7% lower levels of lipid peroxidation was found, but higher levels of Fv/Fm (1.6%), Fv'/Fm' (11.8%), qP (40.0%), ETR (56.4%), catalase activity (82.8%), shoot biomass (38.1%) and Se content in the shoots (17.8%). Fifty-three metabolic compounds were altered in response to JA application compared to the Se group. Of those, JA application induced increased secondary metabolites of the rhizosphere, including organoheterocyclic compounds, lipids and lipid-like molecules, organic acids and derivatives, and benzenoids, which may be crucial for defense against Se stress and Se accumulation. Conclusions Foliar spraying with JA is an effective measure to alleviate the adverse effects of Se stress and enhance Se accumulation for optimizing crop Se biofortification in high Se soil.

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