Metabolic Resistance to Acetyl-CoA Carboxylase-Inhibiting Herbicide Cyhalofop-Butyl in a Chinese Echinochloa crus-galli Population
文献类型： 外文期刊
作者： Yang, Qian 1 ; Yang, Xia 2 ; Zhu, Jinlei 1 ; Wei, Tian 1 ; Lv, Min 1 ; Li, Yongfeng 2 ;
作者机构： 1.Inst Agr Sci Lixiahe Reg Jiangsu, Yangzhou 225007, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Crop Germplasm & Biotechnol, Nanjing 210014, Peoples R China
关键词： resistance mechanisms; metabolism; cyhalofop-butyl; Echinochloa crus-galli; resistance pattern; multiple-resistance
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 11 期
页码：
收录情况： SCI
摘要： A population of Echinochloa crus-galli (L.) P. Beauv obtained from direct-seeding rice fields in Jiangxi Province, China, exhibited high resistance levels (13.5-fold) to the acetyl-CoA carboxylase (ACCase)-inhibiting herbicide cyhalofop-butyl. Compared with the susceptible (S) population, this resistant (R) population evolved a cross-resistance to aryloxyphenoxypropionates (APPs) herbicides metamifop (2.9-fold) and fenoxapro-p-ethyl (4.1-fold), cyclohexanediones (CHDs) herbicide clethodim (4.7-fold), phenyl pyrazoline (DEN) herbicide pinoxaden (6.4-fold), and evolved multiple-resistance to acetolactate synthase (ALS)-inhibiting herbicide penoxsulam (3.6-fold), and auxin mimic herbicides quinclorac (>34.7-fold) and florpyrauxifen-benzyl (2.4-fold). ACCase gene sequencing did not reveal the existence of any known mutation point conferring with herbicide resistance. In addition, three metabolic inhibitors-one glutathione-S-transferase (GST) inhibitor (NBD-Cl), and two cytochrome P450 inhibitors (malathion and PBO)-did not reverse the cyhalofop-butyl resistance. Furthermore, enhanced metabolic rates of more than 60% 24 h after treatment with the active compound cyhalofop acid was observed in R plants compared to S plants. Hence, enhanced metabolism activity endows a non-target-site resistance to cyhalofop-butyl in the R population of E. crus-galli. Future research will be required to determine what metabolizing enzyme genes are responsible for cyhalofop-butyl resistance in E. crus-galli.
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