Cucumber mosaic virus-mediated Regulation of Disease Development Caused by Tomato mosaic virus in Tomato Hosts

Hong Guo; Shaoning Chen; Rong Zeng; Zhiyou Du; Zhenxiao Zhang; Weimin Zhu; Jishuang Chen

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Cucumber mosaic virus-mediated Regulation of Disease Development Caused by Tomato mosaic virus in Tomato Hosts

Hong Guo 1 #,Shaoning Chen 1,Rong Zeng 1,Zhiyou Du 2,Zhenxiao Zhang 2,Weimin Zhu 3,Jishuang Chen 2 *

1.Institute of Bioengineering,Zhejiang Sci-Tech University

2.Zhejiang Sci-Tech University

3.Shanghai Academy of Agricultural Sciences

*Correspondence author

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Funding: 科技部国际合作项目（No.2004DFA05000）

Opened online: 2 March 2009

Accepted by: none

Citation: Hong Guo,Shaoning Chen,Rong Zeng.Cucumber mosaic virus-mediated Regulation of Disease Development Caused by Tomato mosaic virus in Tomato Hosts[OL]. [ 2 March 2009] http://en.paper.edu.cn/en_releasepaper/content/29796

Cucumber mosaic virus (CMV) and Tomato mosaic virus (ToMV) are two principal viruses infecting tomato (Lycopersicon esculentum Mill). N5 is a necrosis strain of ToMV. In this work, interference between these two virues was analyzed in tomato cv. Hezuo 903. Plants were first inoculated with CMV-Fny or CMV-Fny∆2b, respectively. 7 days postinoculation (dpi), a second challenge inoculation was performed with ToMV-N5. The results showed that plants can be protected against challenge with ToMV-N5 by initial CMV-Fny infection, but not by CMV-Fny2b. The accumulation of these three viruses in single and double infections was detected by real-time reverse transcription-polymerase chain reaction (real-time RT-PCR) assays. The real-time RT-PCR values indicated that ToMV-N5 accumulation was significantly suppressed by double infection with CMV-Fny in the second true leaves. The interaction between PVX and ToMV was further studied. The host reaction of PVX-BJ and ToMV-N5 double infections was almost the same as in ToMV-N5 singly infections. Based on above results, we speculate that the 2b protein may be an important determinant involved in CMV-mediated regulation of disease development caused by ToMV-N5 in tomato cv. Hezuo 903.

Keywords:Tomato mosaic virus;Necrosis;Real-time RT-PCR;2b protein;Interference

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