Minimized Atrazine Risks to Crop Security and Its Residue in the Environment by a Rice Methyltransferase as a Regulation Factor
文献类型： 外文期刊
作者： Ma, Li Ya 1 ; Zhang, Ai Ping 1 ; Liu, Jintong 1 ; Zhang, Nan 1 ; Chen, Min 1 ; Yang, Hong 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Sci, Jiangsu Key Lab Pesticide Sci, Nanjing 210095, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China
3.Nanjing Agr Univ, Key Lab Monitoring & Management Crop Dis & Pest I, Minist Agr, Nanjing 210095, Peoples R China
关键词： atrazine; methyltransferases; pesticide contamination; metabolism; rice
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.895； 五年影响因子：6.048 ）
ISSN： 0021-8561
年卷期： 2022 年 70 卷 1 期
页码：
收录情况： SCI
摘要： Atrazine (ATZ) is an agricultural pesticide for controlling field weeds. ATZ accumulates in many crops, posing high risks to crop production and food safety. Characterizing one of the novel rice MT genes named Oryza sativa atrazine-responsive methyltransferase (OsARM) showed that the expression of OsARM was associated with DNA demethylation (hypomethylation) in its promoter region. The enhancement of OsARM expression was manifested by the attenuated symptoms of ATZ toxicity including better growth and lower ATZ accumulation in plants. The promoted capacity of detoxification was confirmed by transgenic rice overexpression OsARM lines and also functionally proved by CRISPR-Cas9 knockout mutants. The transgenic lines accumulate more ATZ metabolites in rice and lower concentrations in the growth environment, pointing out that ATZ metabolism or degradation can be intensified. The ATZ-induced DNA demethylation is an important hallmark representing the epigenetic mechanism, which is required for the extra OsARM expression to facilitate ATZ disappearance in rice and the environment.
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