Dinitroaniline Herbicide Resistance and Mechanisms in Weeds.
Dinitroaniline Herbicide Resistance and Mechanisms in Weeds.
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DOI：
10.3389/fpls.2021.634018
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发表时间：
2021
影响因子：
5.6
通讯作者：
Powles S
中科院分区：
文献类型：
--
作者：
Chen J;Yu Q;Patterson E;Sayer C;Powles S
二硝基苯胺是微管抑制剂，靶向植物和原生生物中的微管蛋白。二硝基苯胺类除草剂，如氟乐灵、二甲戊灵和安磺灵，几十年来一直用作芽前除草剂用于杂草控制。由于杂草对出苗后除草剂的广泛抗性，出苗前除草剂如二硝基苯胺的使用有所增加，部分原因是杂草对这些除草剂的抗性进化相对缓慢。由于α-微管蛋白基因中的点突变引起的对二硝基苯胺除草剂的靶点抗性（TSR）已经在一些杂草植物物种中得到证实（例如，牛筋草，狗尾草，最近在硬实黑麦草）。特别感兴趣的是从二硝基苯胺抗性L.当植物纯合突变时，引起螺旋生长的刚性。TSR的隐性性质，加上一些抗性突变可能的适应性成本，可能会减缓抗性进化。此外，对二硝基苯胺的非靶点抗性（NTSR）很少报道，仅在硬直黑麦草中证实，这是由于除草剂代谢增强（代谢抗性）。细胞色素P450基因（CYP 81 A10）是近年来在L.对氟乐灵产生抗药性的硬菌。此外，TSR和NTSR已被证明共存于相同的杂草物种，人口，和植物。讨论了TSR和NTSR的知识和信息在二硝基苯胺抗性管理中的意义。
Dinitroanilines are microtubule inhibitors, targeting tubulin proteins in plants and protists. Dinitroaniline herbicides, such as trifluralin, pendimethalin and oryzalin, have been used as pre-emergence herbicides for weed control for decades. With widespread resistance to post-emergence herbicides in weeds, the use of pre-emergence herbicides such as dinitroanilines has increased, in part, due to relatively slow evolution of resistance in weeds to these herbicides. Target-site resistance (TSR) to dinitroaniline herbicides due to point mutations in α-tubulin genes has been confirmed in a few weedy plant species (e.g., Eleusine indica, Setaria viridis, and recently in Lolium rigidum). Of particular interest is the resistance mutation Arg-243-Met identified from dinitroaniline-resistant L. rigidum that causes helical growth when plants are homozygous for the mutation. The recessive nature of the TSR, plus possible fitness cost for some resistance mutations, likely slows resistance evolution. Furthermore, non-target-site resistance (NTSR) to dinitroanilines has been rarely reported and only confirmed in Lolium rigidum due to enhanced herbicide metabolism (metabolic resistance). A cytochrome P450 gene (CYP81A10) has been recently identified in L. rigidum that confers resistance to trifluralin. Moreover, TSR and NTSR have been shown to co-exist in the same weedy species, population, and plant. The implication of knowledge and information on TSR and NTSR in management of dinitroaniline resistance is discussed.
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4.1
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