Vitellogenin and vitellogenin receptor gene expression profiles in Spodoptera exigua are related to host plant suitability

文献类型： 外文期刊

第一作者： Zhao, Jing

作者： Zhao, Jing;Sun, Yang;Xiao, Liubin;Tan, Yongan;Jiang, Yiping;Bai, Lixin;Zhao, Jing

作者机构：

关键词： Spodoptera exigua;host plants;vitellogenin;vitellogenin receptor;fecundity

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

ISSN： 1526-498X

年卷期： 2018 年 74 卷 4 期

页码：

收录情况： SCI

摘要： BACKGROUNDThe beet armyworm Spodoptera exigua, a worldwide phytophagous pest, causes considerable economic agricultural losses. Understanding the relationship between its fecundity and the host plant is a basic and important component of early forecasting of beet armyworm outbreaks. However, little is known about the molecular mechanism by which distinct hosts affect S. exigua fecundity. RESULTSIn this study, key life-history parameters of S. exigua reared on distinct hosts were investigated; the host plants could be ranked as lettuce > shallot > tomato > celery in their order of suitability. Full-length S. exigua vitellogenin receptor (SeVgR) cDNA was cloned, and sex-, stage- and tissue-specific expression characteristics were assessed. Spodoptera exigua vitellogenin (SeVg) and SeVgR expression levels were markedly modulated by host nutrients (P < 0.05). SeVg and SeVgR expression levels were significantly higher in S. exigua reared on lettuce, the most preferred and most nutritive host, than in those reared on tomato and celery. Interestingly, significant linear regression correlations were found between SeVg and SeVgR expression levels and key S. exigua life-history parameters, especially life span, pupa weight, and female fecundity (P < 0.01). CONCLUSIONHost plant type and suitability could affect the expression pattern of SeVg and SeVgR, which influenced S. exigua fecundity. Vg and VgR have the potential to be used as molecular markers of S. exigua fecundity and for forecasting outbreaks of S. exigua on different hosts. (c) 2017 Society of Chemical Industry

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