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http://dx.doi.org/10.5423/PPJ.2002.18.6.317

Identification and Characterization of a Ringspot Isolate of Odontoglossum ringspot virus from Cymbidium var.'Grace Kelly'  

Park, Won-Mok (Graduate School of Biotechnology, Korea University)
Park, Seung-Kook (Plant Virus GenBank, Division of Life and Environmental Sciences, Seoul Women’s University)
Park, Sun-Hee (Plant Virus GenBank, Division of Life and Environmental Sciences, Seoul Women’s University)
Ryu, Ki-Hyun (Division of Biomedical Science, ai Chai University)
Park, Chang-Won (Division of Biological Environment, Kangwon National University)
Park, Jang-Kyung (Graduate School of Biotechnology, Korea University)
Publication Information
The Plant Pathology Journal / v.18, no.6, 2002 , pp. 317-322 More about this Journal
Abstract
An isolate of Odontoglossum ringspot virus (ORSV) was identified from Cymbidium var. 'Grace Kelly' showing ringspot symptom on the floral and leaf parts, and was denoted as cymbidium ringspot isolate (ORSV-CR). In ultrathin sections of leaf tissue from diseased Cymbidium plants, clusters of virus particles were observed in the vacuole and cytoplasm. In the Western blot hybridization, the virus strongly reacted with ORSV-specific antiserum indistinguishable from ORSV, suggesting that the vims is serologically identical with ORSV. ORSV-CR sap was inoculated onto 20 species belonging to 12 genera. Systemic infection occurred in Cymbidium sp., Nicotiana benthamiana and N. clevelandii, the host of which was found to be different from that of ORSV-Cy, the Korean strain of ORSV. The analysis of coat protein (CP) gene showed that ORSV-CR was highly homologous to the known isolates of ORSV, with over 95.6% identity in amino acid level. Phylogenetic tree analysis of CP showed that ORSV-CR was clustered with the known ORSV isolates, suggesting that ORSV is a very stable tobamovirus.
Keywords
coat protein; Cymbidium; identification; Odontoglossum ringspot virus; Tobamovirus;
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