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Application of glutamic acid improved As tolerance in aromatic rice at early growth stage

文献类型： 外文期刊

作者： Huang, Suihua 1 ; Yang, Xiuli 1 ; Chen, Guang 1 ; Wang, Xu 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Qual Stand & Monitoring Technol Agroprod, Guangzhou 510640, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Testing & Evaluat Agroprod Safety & Qual, Guangzhou 510640, Peoples R China

3.Guangdong Prov Key Lab Qual & Safety Risk Assessme, Guangzhou 510640, Peoples R China

4.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China

关键词： Arsenite stress; L-glutamate; Ultra-structure; Ascorbate-glutathione cycle; Metabolome

期刊名称：CHEMOSPHERE （ 影响因子：8.8； 五年影响因子：8.3 ）

ISSN： 0045-6535

年卷期： 2023 年 322 卷

页码：

收录情况： SCI

摘要： To alleviate the arsenic (As) toxicity in aromatic rice, a hydroponic experiment of two As concentrations (0 and 100 mu M sodium arsenite: A0, A1), three glutamic acid (Glu) concentrations (0, 100, and 500 mu M L-glutamic acid: G0, G1, and G2) with Xiangyaxiangzhan and Meixiangzhan 2 was conducted. Results showed that the root As content were increased under A1G2 but reduced under A1G1 for Xiangyaxiangzhan as compared with A1G0. A decrement of As was transported from root to shoot caused by up-regulated OsABCC1 relative expression in Meixiangzhan 2. Likewise, As stress enhanced the H2O2 and malondialdehyde content, resulting in the impaired cell wall observed by transmission electron microscopy. However, compared with A1G0, the superoxide dis-mutase activity, ascorbic acid, glutathione, proline, and soluble sugar content were increased under A1G1. Additionally, arsenate reductase, monodehydroascorbate reductase activity, Glu, proline, and soluble sugar content were found positively associated with the As accumulation. Further, the metabolome analysis indicated that the pathway of amino acid and arginine biosynthesis were notably enriched after Glu application. Generally, 100 mu M Glu application was the better treatment to enhance As tolerance in aromatic rice through up-regulating amino acid biosynthesis with increasing antioxidants and osmolytes to scavenge excessive reactive oxygen species.

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