数字农科院2.0

Cytochrome P450 CYP6EM1 Underpins Dinotefuran Resistance in the Whitefly Bemisia tabaci

文献类型： 外文期刊

作者： Mingjiao Huang;Buli Fu;Cheng Yin;Peipan Gong;Shaonan Liu;Jing Yang;Xuegao Wei;Jinjin Liang;Hu Xue;Chao He;Tianhua Du;Chao Wang;Yao Ji;Jin Yu Hu;Rong Zhang;He Du;Youjun Zhang;Xin Yang

作者机构：

关键词： Bemisia tabaci;cytochrome P450;dinotefuran;insecticide resistance;resistance management

期刊名称： Journal of Agricultural and Food Chemistry

ISSN： 0021-8561

年卷期： 2024 年 72 卷 10 期

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Being a destructive pest worldwide, the whitefly Bemisia tabaci has evolved resistance to neonicotinoid insecticides. The third-generation neonicotinoid dinotefuran has commonly been applied to the control of the whitefly, but its underlying mechanism is currently unknown. On the base of our transcriptome data, here we aim to investigate whether the cytochrome P450 CYP6EM1 underlies dinotefuran resistance in the whitefly. Compared to the susceptible strain, the CYP6EM1 gene was found to be highly expressed in both laboratory and field dinotefuran-resistant populations. Upon exposure to dinotefuran, the mRNA levels of CYP6EM1 were increased. These results demonstrate the involvement of this gene in dinotefuran resistance. Loss and gain of functional studies in vivo were conducted through RNAi and transgenic Drosophila melanogaster assays, confirming the role of CYP6EM1 in conferring such resistance. In a metabolism assay in vitro, the CYP6EM1 protein could metabolize 28.11% of dinotefuran with a possible dinotefuran-dm-NNO metabolite via UPLC-QTOF/MS. Docking of dinotefuran to the CYP6EM1 protein showed a good binding affinity, with an energy of less than −6.0 kcal/mol. Overall, these results provide compelling evidence that CYP6EM1 plays a crucial role in the metabolic resistance of B. tabaci to dinotefuran. Our work provides new insights into the mechanism underlying neonicotinoid resistance and applied knowledge that can contribute to sustainable control of a global pest such as whitefly.

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