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Virology Journal

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Open Access 01-12-2018 | Research

NS3 Protein from Rice stripe virus affects the expression of endogenous genes in Nicotiana benthamiana

Authors: Gentu Wu, Guixian Zheng, Qiao Hu, Mingge Ma, Mingjun Li, Xianchao Sun, Fei Yan, Ling Qing

Published in: Virology Journal | Issue 1/2018

Abstract

Background

Rice stripe virus (RSV) belongs to the genus Tenuivirus. It is transmitted by small brown planthoppers in a persistent and circulative-propagative manner and causes rice stripe disease (RSD). The NS3 protein of RSV, encoded by the viral strand of RNA3, is a viral suppressor of RNA silencing (VSR). NS3 plays a significant role in viral infection, and NS3-transgenic plants manifest resistance to the virus.

Methods

The stability and availability of NS3 produced by transgenic Nicotiana benthamiana was investigated by northern blot analysis. The accumulation of virus was detected by western blot analysis. Transcriptome sequencing was used to identify differentially expressed genes (DEGs) in NS3-transgenic N. benthamiana.

Results

When the host plants were inoculated with RSV, symptoms and viral accumulation in NS3-transgenic N. benthamiana were reduced compared with the wild type. Transcriptome analysis identified 2533 differentially expressed genes (DEGs) in the NS3-transgenic N. benthamiana, including 597 upregulated genes and 1936 downregulated genes. These DEGs were classified into three Gene Ontology (GO) categories and were associated with 43 GO terms. KEGG pathway analysis revealed that these DEGs were involved in pathways associated with ribosomes (ko03010), photosynthesis (ko00195), photosynthesis-antenna proteins (ko00196), and carbon metabolism (ko01200). More than 70 DEGs were in these four pathways. Twelve DEGs were selected for RT-qPCR verification and subsequent analysis. The results showed that NS3 induced host resistance by affecting host gene expression.

Conclusion

NS3, which plays dual roles in the process of infection, may act as a VSR during RSV infection, and enable viral resistance in transgenic host plants. NS3 from RSV affects the expression of genes associated with ribosomes, photosynthesis, and carbon metabolism in N. benthamiana. This study enhances our understanding of the interactions between VSRs and host plants.

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Title: NS3 Protein from Rice stripe virus affects the expression of endogenous genes in Nicotiana benthamiana
Authors: Gentu Wu
Guixian Zheng
Qiao Hu
Mingge Ma
Mingjun Li
Xianchao Sun
Fei Yan
Ling Qing
Publication date: 01-12-2018
Publisher: BioMed Central
Published in: Virology Journal / Issue 1/2018
Electronic ISSN: 1743-422X
DOI: https://doi.org/10.1186/s12985-018-1014-7

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NS3 Protein from Rice stripe virus affects the expression of endogenous genes in Nicotiana benthamiana

Abstract

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Conclusion

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