数字农科院2.0

Unearthing the alleviatory mechanisms of hydrogen sulfide in aluminum toxicity in rice

文献类型： 外文期刊

作者： Chun Quan Zhu;Qian Qian Wei;Wen Jun Hu;Ya Li Kong;Xing Jia Xiang;Hui Zhang;Xiao Chuang Cao;Lian Feng Zhu;Jia Liu;Wen Hao Tian;Qian Yu Jin;Jun Hua Zhang

作者机构：

关键词： Al toxicity;AsA-GSH cycle;Cell wall;Energy production;Ethylene;H2S;Transcriptome

期刊名称： Plant Physiology and Biochemistry

ISSN： 0981-9428

年卷期： 2022 年 182 卷

页码：

收录情况： SCIE（2022版）

摘要： Hydrogen sulfide (H2S) improves aluminum (Al) resistance in rice, however, the underlying mechanism remains unclear. In the present study, treatment with 30-μM Al significantly inhibited rice root growth and increased the total Al content, apoplastic and cytoplasm Al concentration in the rice roots. However, pretreatment with NaHS (H2S donor) reversed these negative effects. Pretreatment with NaHS significantly increased energy production under Al toxicity conditions, such as by increasing the content of ATP and nonstructural carbohydrates. In addition, NaHS stimulated the AsA-GSH cycle to decrease the peroxidation damage induced by Al toxicity. Pretreatment with NaHS significantly inhibited ethylene emissions in the rice and then inhibited pectin synthesis and increased the pectin methylation degree to reduce cell wall Al deposition. The phytohormones indole-3-acetic and brassinolide were also involved in the alleviation of Al toxicity by H2S. The transcriptome results further confirmed that H2S alleviates Al toxicity by increasing the pathways relating to material and energy metabolism, redox reactions, cell wall components, and signal transduction. These findings improve our understanding of how H2S affects rice responses to Al toxicity, which will facilitate further studies on crop safety.

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