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Insulin peptides and their receptors regulate ovarian development and oviposition behavior in Diaphorina citri

文献类型： 外文期刊

作者： Wang, Ziye 1 ; Tan, Delong 3 ; Wang, Feifeng 1 ; Guo, Shuhao 1 ; Liu, Jinhua 4 ; Cuthbertson, Andrew G. S. 1 ; Qiu, Baoli 1 ; Sang, Wen 1 ;

作者机构： 1.South China Agr Univ, Key Lab Biopesticide Innovat & Applicat Guangdong, Guangzhou, Peoples R China

2.Guangdong Lab Lignan Modern Agr, Guangzhou, Peoples R China

3.Guangdong Acad Agr Sci, Inst Facil Agr, Guangzhou, Peoples R China

4.Zhejiang YangShengTang Co Ltd, Nat Med Inst, Guangzhou, Peoples R China

关键词： Diaphorina citri; insulin-like peptide; insulin receptor; insulin signaling; reproduction; target of rapamycin

期刊名称：INSECT SCIENCE （ 影响因子：3.605； 五年影响因子：3.323 ）

ISSN： 1672-9609

年卷期：

页码：

收录情况： SCI

摘要： Diaphorina citri is an important vector of Citrus Huanglongbing (HLB) disease. After feeding on young host plant shoots, the population of D. citri can increase significantly. Females also only lay eggs on young shoots. However, there are few studies on the mechanism of this phenomenon. Exogenous nutrient signals can affect the insulin signaling system of D. citri after feeding on young shoots. In this study, the expression of upstream factors DcILP1, DcILP2, and DcIR in the insulin signaling system of D. citri was upregulated after feeding on young shoots. After being silenced by RNA interference technology, the results showed that the number of oviposited eggs of D. citri was significantly decreased and the ovarian development was inhibited with severe vacuolation. In addition, detection using quantitative reverse transcription-polymerase chain reaction showed that the upstream regulatory gene DcRheb of the target of rapamycin (TOR) pathway and the downstream reproduction-related DcVg gene were also significantly downregulated. These results suggest that feeding upon young shoots may upregulate the expression levels of upstream factors DcILP1, DcILP2, and DcIR in the insulin signaling system. The signal will be through upregulating the expression of DcRheb, an upstream gene of the TOR signaling pathway. This in turn influences yolk metabolism, which eventually causes the ovaries of female D. citri to mature and therefore initiate oviposition behavior.

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