文献类型： 外文期刊

作者： Tong, Yao ¹ ; Li, Yong-Feng ² ; Yi, Shan-Chi ¹ ; Fan, Dan-Li ¹ ; Qiu, Zhuo-Xun ¹ ; Wei, Chen-Yang ¹ ; Huang, Meng-Ge ¹ ; Zeng, Dong-Qiang ¹ ; Tang, Wen-Wei ¹ ;

作者机构： 1.Guangxi Univ, Coll Agr, Guangxi Key Lab Agroenvironm & Agr Prod Safety, Nanning, Peoples R China

2.Jiangsu Acad Agr Sci, Excellence & Innovat Ctr, Nanjing, Peoples R China

关键词： Echinochloa crus-galli var; zelayensis; quinclorac; aquaporin; translocation

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.462； 五年影响因子：4.688 ）

ISSN： 1526-498X

年卷期：

页码：

收录情况： SCI

摘要： Background Echinochloa crus-galli var. zelayensis is a troublesome weed in rice fields and can be controlled by using quinclorac. However, over-reliance on quinclorac has resulted in resistant (R) barnyardgrass, which differs significantly in its ability to transport quinclorac compared to susceptible (S) barnyardgrass. This study aimed to investigate the underlying mechanisms for this different translocation between R and S barnyardgrass. Results Larger amount of quinclorac was transferred from shoots to roots in R compared to S barnyardgrass. After 1 day of quinclorac [300 g active ingredient (a.i.) ha(-1)] foliar treatment, its content in shoots of R was 81.92% of that in S barnyardgrass; correspondingly, in roots of R was 1.17 fold of that in S barnyardgrass. RNA-sequencing and quantitative real-time polymerase chain reaction (qRT-PCR) confirmed the expression levels of PIPs belonging to aquaporins (AQPs) in R were higher than in S barnyardgrass, with or without quinclorac treatment. With co-application of quinclorac and AQPs inhibitors [mercury(II) chloride (HgCl2)] treatment, even though the expression levels of PIPs and the transport rates of quinclorac were both suppressed in R and S barnyardgrass, this process was less pronounced in R than in S barnyardgrass. Conclusion This report provides clear evidence that higher PIPs expression results in rapid quinclorac translocation from shoots to roots and reduces the quinclorac accumulation in the shoot meristems in R barnyardgrass, thus reducing the control efficacy of quinclorac. (c) 2022 Society of Chemical Industry.