Dataset Information

Comparative Transcriptome and iTRAQ Proteome Analyses Reveal the Mechanisms of Diapause in Aphidius gifuensis Ashmead (Hymenoptera: Aphidiidae).

ABSTRACT: Aphidius gifuensis Ashmead (Hymenoptera: Aphidiidae) is a solitary endoparasitoid used in the biological control of various aphids. Diapause plays an important role in the successful production and deployment of A. gifuensis. Diapause can effectively extend the shelf life of biological control agents and solve several practical production problems like long production cycles, short retention periods, and discontinuities between supply and demand. In recent years, studies have been conducted on the environmental regulation and physiological and biochemical mechanisms of diapause in A. gifuensis. Nevertheless, the molecular mechanism of diapause in this species remains unclear. In this study, we compared the transcriptomes and proteomes of diapause and non-diapause A. gifuensis to identify the genes and proteins associated with this process. A total of 557 transcripts and 568 proteins were differentially expressed between the two groups. Among them, (1) genes involved in trehalose synthesis such as glycogen synthase, glycogen phosphorylase, and trehalose 6-phosphate synthase were upregulated in diapause at mRNA or protein level while glycolysis and gluconeogenesis-related genes were downregulated, suggesting that A. gifuensis stores trehalose as an energy resource and cryoprotectant; (2) the expression of immune-related genes like C-type lectins, hemocyanin, and phenoloxidase was increased, which helps to maintain immunity during diapause; (3) a chitin synthase and several cuticular protein genes were upregulated to harden the cuticle of diapausing A. gifuensis larval. These findings improve our understanding of A. gifuensis. diapause and provide the foundation for further pertinent studies.

SUBMITTER: Zhang HZ

PROVIDER: S-EPMC6284037 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Publications

Comparative Transcriptome and iTRAQ Proteome Analyses Reveal the Mechanisms of Diapause in Aphidius gifuensis Ashmead (Hymenoptera: Aphidiidae).

Zhang Hong-Zhi HZ Li Yu-Yan YY An Tao T Huang Feng-Xia FX Wang Meng-Qing MQ Liu Chen-Xi CX Mao Jian-Jun JJ Zhang Li-Sheng LS

Frontiers in physiology 20181130

Aphidius gifuensis Ashmead (Hymenoptera: Aphidiidae) is a solitary endoparasitoid used in the biological control of various aphids. Diapause plays an important role in the successful production and deployment of A. gifuensis. Diapause can effectively extend the shelf life of biological control agents and solve several practical production problems like long production cycles, short retention periods, and discontinuities between supply and demand. In recent years, studies have been ...[more]

PMID: 30555341

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Project description:The integrated pest management (IPM) strategy was developed and used in combination with pesticides and beneficial biological control agents. To further develop IPM efficiency, it is important to evaluate the side effects of pesticides on biological control agents. Aphidius gifuensis is one of the most important aphid natural enemies and has been successfully used to control Myzys persicae and other aphid species. Imidacloprid (IMD) is a popular pesticide used worldwide and is highly toxic to non-target arthropods. Here, we investigated the short-term sublethal toxicity of IMD in Aphidius gifuensis and its impact on the biological performance and gene expression of this parasitoid. We found that sublethal IMD doses had a significant negative effect on the life history traits of female A. gifuensis, including shortening the lifespan and lowering parasitic capacity. Moreover, exposure to sublethal IMD also adversely affected the response of A. gifuensis to aphid-infested plant volatiles. Based on the transcriptome analysis, we found that the exposure to sublethal IMD doses significantly affected expression of genes involved in the central nervous system, energy metabolism, olfactory, and detoxification system of A. gifuensis. RT-qPCR also revealed that short term expose to sublethal IMD doses significantly induced the gene expression of genes related to the central nervous system (nAChRa7, nAChRa9, TbH, OAR1, NFR, TYR, and DAR1), olfactory system (OR28 and IR8a1), and detoxification system (CYP49p3, CYP6a2, and POD), while it suppressed the expression of genes involved in the central nervous system (nAChRa4 and nAChRb1), olfactory system (Orco1, IR8a2, and GR1), and detoxification system (GST2). Furthermore, exposure to sublethal doses of IMD also significantly increased the activities of CarEs and POD, whereas we observed no influence on the activities of CAT, GST, and SOD. Our results indicate that sublethal IMD doses might adversely affect the biological performance of A. gifuensis by altering gene expression related to the function of olfactory, nervous, energy metabolism, and detoxification systems. Thus, how the use of pesticides directly affect insect population should be considered when used in conjunction with natural pest parasitoids in IPM strategies.

Dataset Information

Comparative Transcriptome and iTRAQ Proteome Analyses Reveal the Mechanisms of Diapause in Aphidius gifuensis Ashmead (Hymenoptera: Aphidiidae).

Publications

Comparative Transcriptome and iTRAQ Proteome Analyses Reveal the Mechanisms of Diapause in <i>Aphidius gifuensis</i> Ashmead (Hymenoptera: Aphidiidae).

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