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Identification of two RNA silencing suppressors from banana bunchy top virus

文献类型: 外文期刊

作者: Niu, Shengniao 1 ; Wang, Baosheng 2 ; Guo, Xiaofen 2 ; Yu, Jialin 2 ; Wang, Xianbing 2 ; Xu, Kai 2 ; Zhai, Yafeng 2 ; Wan 1 ;

作者机构: 1.Chinese Acad Trop Agr Sci, Key Lab Trop Crop Biotechnol, Minist Agr, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China

2.China Agr Univ, State Key Lab Agrobiotechnol, Coll Biol Sci, Beijing 100094, Peoples R China

期刊名称:ARCHIVES OF VIROLOGY ( 影响因子:2.574; 五年影响因子:2.466 )

ISSN: 0304-8608

年卷期: 2009 年 154 卷 11 期

页码:

收录情况: SCI

摘要: In order to suppress RNA silencing, many plant and some animal viruses encode RNA silencing suppressors to achieve infection. In this study, we report that B3 and B4, encoded by DNA3 and DNA4 of banana bunchy top virus (BBTV), exhibit RNA silencing suppression activity. B3 and B4 were able to increase the transient expression of green fluorescent protein (GFP) and dramatically enhanced the pathogenicity of potato virus X (PVX) in Nicotiana benthamiana. B4 was able to reverse established gene silencing on an inoculated leaf or on an upper leaf. B3, however, was only active during infection of an inoculated leaf. Furthermore, B4, but not B3, was able to enhance GFP expression in the transgenic N. benthamiana line 16c. In conclusion, B3 and B4 are the RNA silencing suppressors of BBTV, and they may act at different steps in the RNA silencing pathways.

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