文献类型： 外文期刊

作者： Peng Qiong ¹ ; Han Heping ³ ; Yang Xia ¹ ; Bai Lianyang ¹ ; Yu Qin ³ ; Powles, Stephen B. ³ ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, Changsha 410125, Hunan, Peoples R China

2.Hunan Univ Humanities Sci & Technol, Collaborat Innovat Ctr Field Weeds Control, Loudi 417000, Peoples R China

3.Univ Western Australia, Australian Herbicide Resistance Initiat, Sch Agr & Environm, Perth, WA 6009, Australia

4.Jiangsu Acad Agr Sci, Nanjing 210014, Jiangsu, Peoples R China

关键词： Echinochloa crus-galli; quinclorac resistance; quinclorac metabolism; beta-cyanoalanine synthase; 1-aminocyclopropane-1-carboxylic acid synthase; 1-aminocyclopropane-1-carboxylic acid oxidase; rice

期刊名称：RICE SCIENCE （ 影响因子：3.333； 五年影响因子：4.226 ）

ISSN： 1672-6308

年卷期： 2019 年 26 卷 5 期

页码：

收录情况： SCI

摘要： Echinochloa crus-galli is a major weed in rice fields in China, and quinclorac has been long used for its control. Over-reliance of quinclorac has resulted in quinclorac resistance in E. crus-galli. Two resistant (R) E. crus-galli populations from Hunan, China were confirmed to be at least 78-fold more resistant to quinclorac than the susceptible (S) population. No difference in foliar uptake of C-14-labelled quinclorac was detected between the R and S plants. However, a higher level of C-14 translocation and a lower level of quinclorac metabolism were found in the R plants. Basal and induced expression levels of beta-cyanoalanine synthase (beta-CAS) gene and beta-CAS activity were not significantly different between the R and S plants. However, the induction expression of 1-aminocyclopropane-1-carboxylic acid oxidase (ACO1) gene by quinclorac treatment was evident in the S plants but not in the R plants. Quinclorac resistance in the two resistant E. crus-galli populations was not likely to be related to foliar uptake, translocation or metabolism of quinclorac, nor to cyanide detoxification via beta-CAS. Thus, target-site based quinclorac signal reception and transduction and regulation of the ethylene synthesis pathway should be the focus for further research.