Glyphosate Resistance in Eleusine indica: Involvement of CYP71AK44 in Addition to EPSPS Gene Overexpression
文献类型： 外文期刊
作者： He, Sifen 1 ; Tian, Junhui 2 ; Ouyang, Yulan 2 ; Liao, Yuxi 2 ; Yu, Qin 4 ; Bai, Lianyang 1 ; Pan, Lang 2 ;
作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China
2.Hunan Agr Univ, Coll Plant Protect, Changsha 410128, Peoples R China
3.Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, Changsha 410125, Peoples R China
4.Univ Western Australia, Sch Agr & Environm, Australian Herbicide Resistance Initiat, Perth 6009, Australia
关键词： non-target-site resistance (NTSR); EPSPS overexpression; CYP71AK44
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）
ISSN： 0021-8561
年卷期： 2024 年 72 卷 43 期
页码：
收录情况： SCI
摘要： Intensive application of glyphosate has resulted in resistance evolution in many weed populations, including Eleusine indica. This study characterized glyphosate resistance and investigated the underlying mechanisms in a glyphosate-resistant population (R-JX) of E. indica from China. The R-JX population was 8.5 times resistant to glyphosate relative to the glyphosate-susceptible population (SA). Point mutations were not observed in the target gene 5-enolypyruvyl-shikimate-3-phosphate synthase gene (EPSPS). However, the expression level and copy number of EPSPS were 8.8 times and 15.2 times, respectively, greater in R-JX than that in the SA population. Pre-application of the P450 inhibitor lowered the resistance level to glyphosate from 8.5 times to 3.6 times in the R-JX population. RNA-Seq and RT-qPCR revealed that the CYP71AK44 gene was consistently upregulated in R-JX and five other glyphosate-resistant populations. Rice calli and seedlings overexpressing CYP71AK44 showed glyphosate resistance. In conclusion, overexpression of the target EPSPS plus CYP71AK44 collectively contributes to glyphosate resistance in these E. indica populations.
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