Mechanisms of Resistance to Pyroxsulam and ACCase Inhibitors in Japanese Foxtail (Alopecurus japonicus)

文献类型： 外文期刊

第一作者： Feng, Yujuan

作者： Feng, Yujuan;Gao, Yuan;Dong, Liyao;Li, Jun;Zhang, Yong

作者机构：

关键词： ACCase;ALS;nontarget-site-based resistance;target-site-based resistance

期刊名称：WEED SCIENCE （ 影响因子：2.713； 五年影响因子：2.868 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Japanese foxtail is a predominant tetraploid grass weed in wheat and oilseed rape fields in eastern China. In China, pyroxsulam is mainly used to manage annual grass weeds, especially those resistant to acetyl coenzyme A carboxylase (ACCase)-inhibiting herbicides. Using dose-response studies, a pyroxsulam-resistant population, ACTC-1, was identified with a resistance index value of 58. Additionally, ACTC-1 was cross-resistant to sulfonylureas, imidazolinones, triazolopyrimidines, pyrimidinyl-benzoates, and sulfonylaminocarbonyl-triazolinones and multiresistant to ACCase and photosystem II inhibitors. Sequence analysis revealed four gene fragments encoding acetolactate synthase (ALS) from ACTC-1, and three from JNXW-1, a pyroxsulam-sensitive population. An Asp-376-Glu substitution was found in ALS1;2 and an Ile-2041-Asn in Acc1;1, which may be responsible for its resistance to pyroxsulam and ACCase inhibitors, respectively. In vitro assays of ALS activity revealed that in ACTC-1, the sensitivity of ALS to pyroxsulam was lower, and the basal ALS activity was twofold higher than that of sensitive population JNXW-1. Additionally, the combined application of pyroxsulam with malathion or piperonyl butoxide increased the sensitivity of ACTC-1 to pyroxsulam, although it could not completely overcome the resistance. It was inferred that both target-site-based resistance and nontarget-site-based resistance may be involved in the resistance to pyroxsulam.

分类号： S451

  • 相关文献

[1]Cloning of acetyl CoA carboxylase cDNA and the effects of spirodiclofen on the expression of acetyl CoA carboxylase mRNA in Panonychus citri. Yu, Shijiang,Tian, Huixia,Li, Xiaojiao,Yue, Jiansu,Yu, Shijiang,Tian, Huixia,Yang, Juan,Ding, Lili,Chen, Fei,Li, Xiaojiao,Yue, Jiansu,Liu, Haoqiang,Ran, Chun,Chen, Fei.

[2]Identification of Reference Genes for Studying Herbicide Resistance Mechanisms in Japanese Foxtail (Alopecurus japonicus). Xu, Hongle,Li, Jun,Wu, Xibao,Wang, Lingyue,Dong, Liyao,Xu, Hongle,Wu, Renhai,Su, Wangcang.

[3]Mechanism of Fenoxaprop-&ITP&IT-ethyl Resistance in Italian Ryegrass (&ITLolium&IT &ITperenne&IT ssp &ITmultiflorum&IT) from China. Zhang, Pei,Wu, Han,Gao, Yuan,Zhang, Wei,Dong, Liyao,Xu, Hongle.

作者其他论文 更多>>

微信小程序