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Published online ahead of print on 30 September 2009 as doi:10.1099/vir.0.015990-0
J Gen Virol (2009), DOI 10.1099/vir.0.015990-0
© 2009 Society for General Microbiology
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Selective modification of rice (Oryza sativa) gene expression by rice stripe virus infection

Kouji Satoh1, Hiroaki Kondoh2, Takahide Sasaya3, Takumi Shimizu3, Il-Ryong Choi4, Toshihiro Omura3 and Shoshi Kikuchi2,5

1 National Inst of Agrobiological Sciences/National Agricultural Research Center;
2 National Institute of Agrobiological Sciences;
3 National Agricultural Research Center;
4 International Rice Research Institute

5 E-mail: skikuchi{at}nias.affrc.go.jp

Rice stripe disease, caused by rice stripe virus (RSV), is one of the major virus diseases in East Asia. Rice plants infected with RSV usually show symptoms such as chlorosis, weakness, necrosis in newly emerged leaves, and stunting. To reveal rice cellular systems influenced by RSV infection, temporal changes in the transcriptome of RSV-infected plants were monitored by a customized rice oligoarray system. The transcriptome changes in RSV-infected plants indicated that protein synthesis machineries and energy production in the mitochondrion were activated by RSV infection, while energy production in the chloroplast and synthesis of cell structure components were suppressed. The transcription of genes related to host defense systems under hormone signals and those for gene silencing were not activated at the early infection phase. Together with concurrent observation of virus concentration and symptom development, such transcriptome changes in RSV-infected plants suggest that different sets of various host genes are regulated depending on the development of disease symptoms and the accumulation of RSV.

Received 19 August 2009; accepted 24 September 2009.




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