Resistance to mesosulfuron-methyl in Beckmannia syzigachne may involve ROS burst and non-target-site resistance mechanisms
文献类型： 外文期刊
作者： Wang, Junzhi 1 ; Cao, Wanfen 1 ; Guo, Qiushuang 1 ; Yang, Yang 1 ; Bai, Lianyang 1 ; Pan, Lang 1 ;
作者机构： 1.Hunan Agr Univ, Coll Plant Protect, Changsha 410128, Peoples R China
2.Hunan Acad Agr Sci, Changsha 410125, Peoples R China
3.Hunan Univ, Longping Branch, Grad Sch, Changsha 410125, Peoples R China
关键词： Beckmannia syzigachne; Mesosulfuron-methyl; Decreased uptake; Enhanced metabolism; Gene expression; ABC transporter
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：7.129； 五年影响因子：7.284 ）
ISSN： 0147-6513
年卷期： 2022 年 229 卷
页码：
收录情况： SCI
摘要： Herbicide resistance to chemical herbicide is a global issue that presents an ongoing threat to grain production. Though it has been frequently implicated that the production of detoxification enzymes increased in resistance development, the mechanisms for overexpression of these genes employed by herbicide-resistant weeds remain complicated. In this study, a mesosulfuron-methyl resistant Beckmannia syzigachne population (R) was found to be cross-resistant to another herbicide pyriminobac-methyl. No known target-site mutations were detected in the R population. In contrast, the decreased uptake and enhanced metabolic rates of mesosulfuron-methyl were detected in the R than the susceptible (S) population. Two candidate ATP-binding cassette (ABC) transporter genes (ABCB25 and ABCC14) that were constitutively up-regulated in the R population were identified by RNAsequencing and validated by RT-qPCR. Alteration of antioxidant enzyme activities and gene expressions implied that mesosulfuron-methyl-induced antioxidant defenses provoked reactive oxygen species (ROS) burst. ROS scavenger assay showed that ROS induces ABCB25 and ABCC14 expression. This study reported for the first time that ABC transporters mediated non-target-site resistance contributes to mesosulfuron-methyl resistance in a B. syzigachne population, and implicated that ROS burst might be involved in the overexpression of ABC transporter genes in weeds.
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