Unclassified glutathione-S-transferase AiGSTu1 confers chlorantraniliprole tolerance in Agrotis ipsilon
文献类型： 外文期刊
作者： Yang, Hao-Lan 1 ; Yu, Jia-Min 2 ; Cao, Fu 1 ; Li, Wu-Ye 3 ; Li, Bin 2 ; Lei, Xiao 4 ; Li, Shi-Guang 1 ; Liu, Su 1 ; Li, Mao-Ye 1 ;
作者机构： 1.Anhui Agr Univ, Sch Plant Protect, Key Lab Agriprod Qual & Biosafety, Minist Educ,Anhui Prov Key Lab Integrated Pest Man, Hefei 230036, Peoples R China
2.China Natl Tobacco Corp, Sichuan Branch, Chengdu, Peoples R China
3.Anhui Acad Agr Sci, Tobacco Res Inst, Hefei, Peoples R China
4.Sichuan Tobacco Corp, Luzhou Branch, Luzhou, Peoples R China
关键词： black cutworm; GST; detoxification; antioxidant defense; RNA interference
期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.1； 五年影响因子：4.4 ）
ISSN： 1526-498X
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Background: Chlorantraniliprole (CAP) is a diamide insecticide with high efficacy against many pest insects, including the black cutworm, Agrotis ipsilon. Agrotis ipsilon is a serious pest causing significant yield losses in crops. Glutathione-S-transferases (GSTs) belong to a family of metabolic enzymes that can detoxify a wide range of pesticides. However, little is known about the functions of GSTs in CAP tolerance in A. ipsilon.Results: A cDNA sequence (designated AiGSTu1) encoding an unclassified GST was identified from A. ipsilon. AiGSTu1 is highly expressed during the 3(rd) -instar larval and the pupal stages. Most of the mRNA transcripts were found in larval Malpighian tubules. Exposure to CAP strongly enhanced AiGSTu1 expression, GST activity, hydrogen peroxide (H-2 O-2 ) and malondialdehyde levels in larvae. H-2 O-2 treatment upregulated the transcription level of AiGSTu1, suggesting that CAP-induced oxidative stress may activate AiGSTu1 expression. The activity of recombinant AiGSTu1 was inhibited by CAP in a dose-dependent manner. Metabolism assay results demonstrated that AiGSTu1 is capable of depleting CAP. Overexpression of AiGSTu1 enhanced the tolerance of Escherichia coli cells to H-2 O-2 and the oxidative stress inducer, cumene hydroperoxide. Silencing of AiGSTu1 by RNA interference increased the susceptibility of A. ipsilon larvae to CAP.Conclusion: The findings of this study provide valuable insights into the potential role of AiGSTu1 in CAP detoxification and will improve our understanding of CAP tolerance in A. ipsilon.(c) 2023 Society of Chemical Industry.
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