RNA interference in Nilaparvata lugens (Homoptera: Delphacidae) based on dsRNA ingestion

Authors

  • Jie Li,

    1. Hubei Insect Resources Utilisation and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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    • These authors contributed equally to this work.

  • Qiuhong Chen,

    1. National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
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    • These authors contributed equally to this work.

  • Yongjun Lin,

    1. National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
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  • Tingru Jiang,

    1. Hubei Insect Resources Utilisation and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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  • Gang Wu,

    1. Hubei Insect Resources Utilisation and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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  • Hongxia Hua

    Corresponding author
    1. Hubei Insect Resources Utilisation and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
    • College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Abstract

BACKGROUND: An efficient and convenient RNA interference (RNAi) technique involving double-stranded RNA (dsRNA) ingestion is useful for gene function studies of non-model insects.

RESULTS: Three dsRNAs targeting different sites within a gene encoding vacuolar ATP synthase subunit E (V-ATPase-E, 21E01) were synthesised for RNAi in Nilaparvata lugens. dsRNA was found to be stable in 0.1 g mL−1 sucrose solution, but unstable in artificial fodder. Therefore, dsRNAs were orally delivered into N. lugens in 0.1 g mL−1 sucrose solution. RNAi was induced by all three of the dsRNAs at 0.05 µg µL−1 in N. lugens. Time dynamics analysis of gene silencing indicated that significant suppression of the target gene began as early as 2 days after ingestion of ds2-21E01 and ds3-21E01. However, significant repressive effects were recorded up to 10 days after exposure to ds1-21E01. The maximum reduction in target gene mRNA was observed after 10 days of treatment, with suppression ratios induced by ds1-21E01, ds2-21E01 and ds3-21E01 of 41, 55 and 48% respectively.

CONCLUSION: An efficient and convenient RNAi technique involving dsRNA ingestion has been successfully developed for N. lugens. This will be a useful tool for further functional genomic investigation in this organism. Copyright © 2011 Society of Chemical Industry

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