您好，欢迎访问广西农业科学院 机构知识库！

A dinitroaniline herbicide resistance mutation can be nearly lethal to plants

文献类型： 外文期刊

作者： Wang, Yanhui 1 ; Han, Heping 1 ; Chen, Jinyi 1 ; Yu, Qin 1 ; Vila-Aiub, Martin 1 ; Beckie, Hugh J. 1 ; Powles, Stephen B. 1 ;

作者机构： 1.Univ Western Australia UWA, Australian Herbicide Resistance Initiat AHRI, Sch Agr & Environm, 35 Stirling Hwy, Crawley, WA 6009, Australia

2.Univ Buenos Aires UBA, IFEVA CONICET Fac Agron, Dept Ecol, San Martin 4453, RA-1417 Buenos Aires, DF, Argentina

3.Guangxi Acad Agr Sci, Inst Plant Protect, Guangxi Key Lab Biol Crop Dis & Insect Pests, Nanning, Peoples R China

4.Nanjing Agr Univ, Coll Plant Protect, Nanjing, Peoples R China

关键词： trifluralin; resistance cost; alpha-tubulin gene mutation; Arg-243-Met; Val-202-Phe

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： 2022 年 78 卷 4 期

页码：

收录情况： SCI

摘要： BACKGROUND: Lolium rigidum is the most important weed in Australian agriculture and pre-emergence dinitroaniline herbicides (e.g., trifluralin) are widely and persistently used for Lolium control. Consequently, evolution of resistance to dinitroaniline herbicides has been increasingly reported. Resistance-endowing target-site alpha-tubulin gene mutations are identified with varying frequency. This study investigated the putative fitness cost associated with the common resistance mutation Val-202-Phe and the rare resistance mutation Arg-243-Met causing helical plant growth. RESULTS: Results showed a deleterious effect of Arg-243-Met on fitness when plants are homozygous for this mutation. This was evidenced as high plant mortality, severely diminished root and aboveground vegetative growth (lower relative growth rate), and very poor fecundity compared with the wild-type, which led to a nearly lethal fitness cost of >99.9% in competition with a wheat crop. A fitness penalty in vegetative growth was evident, but to a much lesser extent, in plants heterozygous for the Arg-243-Met mutation. By contrast, plants possessing the Val-202-Phe mutation exhibited a fitness advantage in vegetative and reproductive growth. CONCLUSION: The alpha-tubulin mutations Arg-243-Met and Val-202-Phe have contrasting effects on fitness. These results help understand the absence of plants homozygous for the Arg-243-Met mutation and the high frequency of plants carrying the Val-202-Phe mutation in dinitroaniline-resistant L. rigidum populations. The alpha-tubulin Arg-243-Met mutation can have an exceptional fitness cost with nearly lethal effects on resistant L. rigidum plants. (C) 2022 Society of Chemical Industry.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：广西农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台