Diverse ALS mutations and cross-and multiple-resistance to ALS and EPSPS inhibitors in flucarbazone-sodium-resistant Bromus japonicus populations from Hebei province, China

文献类型： 外文期刊

第一作者： Xu, Xian

作者： Xu, Xian;Zhao, Bochui;Li, Binghua;Shen, Beibei;Qi, Zhizun;Wang, Jianping;Cui, Haiyan;Wang, Guiqi;Liu, Xiaomin;Chen, Silong

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关键词： Japanese brome; Flucarbazone-sodium; ALS mutations; Cross -resistance; Multiple -resistance

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：4.7； 五年影响因子：4.7 ）

ISSN： 0048-3575

年卷期： 2024 年 199 卷

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收录情况： SCI

摘要： Japanese brome (Bromus japonicus) has become one of the main weeds in wheat fields in Hebei province of China and causes a large decrease of wheat production. A total of 44 putative resistant and 2 susceptible Japanese brome populations were collected in the 2021/2022 crop season from Hebei province of China to determine resistance levels to flucarbazone-sodium and to investigate the diversity of acetolactate synthase (ALS) mutations, as well as to confirm the cross-and multiple-resistance levels to ALS and EPSPS (5-enolpyruvate shikimate3-phosphate synthetase) inhibitors. Whole plant bioassay results showed that 15 out of 44 populations tested or 34% were resistant to flucarbazone-sodium. The resistance indices of Japanese brome to flucarbazone-sodium ranged from 43 to 1977. The resistant populations were mainly distributed in Baoding and Shijiazhuang districts, and there was only one resistant population in Langfang district. Resistant Japanese brome had diverse ALS mutations, including Pro-197-Ser, -Thr, -Arg and Asp-376-Glu. The incidence of Pro-197-Ser mutation was the highest at 68%. Application of the CYP450 inhibitor malathion suggested that CYP450 was involved in metabolic resistance in a population without an ALS mutation. The population with Pro-197-Thr mutation evolved weak cross-resistance to mesosulfuron-methyl and pyroxsulam, and it is in the process of evolving multiple-resistance to glyphosate.

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