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Journal Article
Research Support, Non-U.S. Gov't
Organ-specific transcriptome response of the small brown planthopper toward rice stripe virus.
Insect Biochemistry and Molecular Biology 2016 March
Rice stripe virus (RSV) causes rice stripe disease and is transmitted by the small brown planthopper (Laodelphax striatellus, SBPH) in a persistent, circulative, and propagative manner. The alimentary canal and salivary gland of SBPH play important roles in viral replication and transmission. However, little is known about the underlying molecular functions of these two organs in the interaction between RSV and SBPH. In this study, organ-specific transcriptomes of the alimentary canal and salivary gland were analyzed in viruliferous and naïve SBPH. The number of differentially expressed unigenes in the alimentary canal was considerably greater than that in the salivary gland after RSV infection, and only 23 unigenes were co-regulated in the two organs. In the alimentary canal, genes involved in lysosome, digestion and detoxification were activated upon RSV infection, whereas the genes related to DNA replication and repair were suppressed. RSV activated RNA transport and repressed the MAPK, mTOR, Wnt, and TGF-beta signaling pathways in the salivary gland. The overall immune reaction toward RSV was much stronger in the salivary gland than in the alimentary canal. RSV activated the pattern recognition molecules and Toll pathway in the salivary gland but inhibited these two reactions in the alimentary canal. The responses from reactive oxygen and the immune-responsive effectors were stronger in the salivary gland than in the alimentary canal after RSV infection. These findings provide clues on the roles of the two organs in confronting RSV infection and aid in the understanding of the interaction between RSV and SBPHs.
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