Different Cucumber mosaic virus-mediated Regulations of Diseases caused by Tomato mosaic virus in two Tomato Varieties

Li Yixing; Guo Hong; Chen Shaoning; Chen Jishuang

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Different Cucumber mosaic virus-mediated Regulations of Diseases caused by Tomato mosaic virus in two Tomato Varieties

Li Yixing *,Guo Hong,Chen Shaoning,Chen Jishuang

Institute of Bioengineering, Zhejiang Sci-Tech University, Road 2, Xiasha, Hangzhou, Zhejiang

*Correspondence author

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Funding: none

Opened online: 2 March 2010

Accepted by: none

Citation: Li Yixing ,Guo Hong,Chen Shaoning.Different Cucumber mosaic virus-mediated Regulations of Diseases caused by Tomato mosaic virus in two Tomato Varieties[OL]. [ 2 March 2010] http://en.paper.edu.cn/en_releasepaper/content/40344

Cucumber mosaic virus (CMV) and Tomato mosaic virus (ToMV) are two principal viruses infecting tomato (Lycopersicon esculentum Mill). In this work, CMV-mediated regulations of diseases caused by ToMV in two tomato varieties were different. When tomato cv. Hezuo 903 plants were first inoculated with CMV-Fny, and then followed by a second inoculation with ToMV-N5 after 6-8 days, plants with co-infection expressed CMV-Fny-induced symptoms. The ToMV-N5-induced necrosis just localized on the inoculated leaves. Typical interference could be summarized for this phenomenon. Systemic necrosis induced by ToMV-N5 and interference between CMV-Fny and ToMV-N5 could not occur in another variety tomato cv.Zhongshu 4. They performed mild mosaic and synergism instead. Different ToMV-N5-induced symptoms in two varieties may be the primary reason of dissimilar ToMV-N5 infections mediated by CMV-Fny. Genotypes of resistance gene Tm2 in tomato cv. Hezuo 903 and Zhongshu 4 had been identified. Results revealed that two tomato varieties genotypes were both consistent with symptoms induced by ToMV-N5. Based on above results, we speculate that different genotypes of Tm2 may bring the difference of ToMV-N5-induced symptoms in two varieties, and this difference may lead dissimilar ToMV-N5 infections mediated by CMV-Fny.

Keywords:Tomato mosaic virus;interference;synergism;Tm2

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