Transcriptome profiling of the whitefly Bemisia tabaci reveals stage-specific gene expression signatures for thiamethoxam resistance
文献类型: 外文期刊
作者: Yang, N.;Xie, W.;Jiao, X.;Yang, X.;Liu, B.;Li, R.;Zhang, Y.;Jones, C. M.;Bass, C.
作者机构:
关键词: Bemisia tabaci;metabolic resistance;thiamethoxam;microarray;stage specific
期刊名称: INSECT MOLECULAR BIOLOGY
ISSN: 0962-1075
年卷期: 2013 年 22 卷 5 期
页码:
收录情况: SCI
摘要: Bemisia tabaci has developed high levels of resistance to many insecticides including the neonicotinoids and there is strong evidence that for some compounds resistance is stage-specific. To investigate the molecular basis of B.tabaci resistance to the neonicotinoid thiamethoxam we used a custom whitefly microarray to compare gene expression in the egg, nymph and adult stages of a thiamethoxam-resistant strain (TH-R) with a susceptible strain (TH-S). Gene ontology and bioinformatic analyses revealed that in all life stages many of the differentially expressed transcripts encoded enzymes involved in metabolic processes and/or metabolism of xenobiotics. Several of these are candidate resistance genes and include the cytochrome P450 CYP6CM1, which has been shown to confer resistance to several neonicotinoids previously, a P450 belonging to the Cytochrome P450s 4 family and a glutathione S-transferase (GST) belonging to the sigma class. Finally several ATP-binding cassette transporters of the ABCG subfamily were highly over-expressed in the adult stage of the TH-R strain and may play a role in resistance by active efflux. Here, we evaluated both common and stage-specific gene expression signatures and identified several candidate resistance genes that may underlie B.tabaci resistance to thiamethoxam.
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