title: First Report of Cucumber mosaic virus Isolated from Wild Vigna angularis var. nipponensis in Korea.
abstract: A viral disease causing severe mosaic, necrotic, and yellow symptoms on Vigna angularis var. nipponensis was prevalent around Suwon area in Korea. The causal virus was characterized as Cucumber mosaic virus (CMV) on the basis of biological and nucleotide sequence properties of RNAs 1, 2 and 3 and named as CMV-wVa. CMV-wVa isolate caused mosaic symptoms on indicator plants, Nicotiana tabacum cv. Xanthi-nc, Petunia hybrida, and Cucumis sativus. Strikingly, CMV-wVa induced severe mosaic and malformation on Cucurbita pepo, and Solanum lycopersicum. Moreover, it caused necrotic or mosaic symptoms on V. angularis and V. radiate of Fabaceae. Symptoms of necrotic local or pin point were observed on inoculated leaves of V. unguiculata, Vicia fava, Pisum sativum and Phaseolus vulgaris. However, CMV-wVa isolate failed to infect in Glycine max cvs. 'Sorok', 'Sodam' and 'Somyeong'. To assess genetic variation between CMV-wVa and the other known CMV isolates, phylogenetic analysis using 16 complete nucleotide sequences of CMV RNA1, RNA2, and RNA3 including CMV-wVa was performed. CMV-wVa was more closely related to CMV isolates belonging to CMV subgroup I showing about 85.1-100% nucleotide sequences identity to those of subgroup I isolates. This is the first report of CMV as the causal virus infecting wild Vigna angularis var. nipponensis in Korea.
authors.affiliation: Crop Protection Division, National Academy of Agricultural Science, Suwon 441-707, Korea ; Department of Plant Medicine, Chungbuk National University, Cheongju 361-763, Korea.
authors.forename: Mi-Kyeong
authors.initials: MK
authors.lastname: Kim
authors.affiliation: Animal, Plant and Fishieries Quarantine and Inspection Agency, Pyeongtaek 451-821, Korea.
authors.forename: Rae-Dong
authors.initials: RD
authors.lastname: Jeong
authors.affiliation: Crop Protection Division, National Academy of Agricultural Science, Suwon 441-707, Korea ; Department of Plant Medicine, Chungbuk National University, Cheongju 361-763, Korea.
authors.forename: Hae-Ryun
authors.initials: HR
authors.lastname: Kwak
authors.affiliation: Department of Applied Biology, Kyungpook National University, Daegu 702-701, Korea.
authors.forename: Su-Heon
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Plant Medicine, Andong National University, Andong 760-749, Korea.
authors.forename: Jeong-Soo
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Korea.
authors.forename: Kook-Hyung
authors.initials: KH
authors.lastname: Kim
authors.affiliation: Department of Plant Medicine, Chungbuk National University, Cheongju 361-763, Korea.
authors.forename: Byeongjin
authors.initials: B
authors.lastname: Cha
authors.affiliation: Crop Protection Division, National Academy of Agricultural Science, Suwon 441-707, Korea.
authors.forename: Hong-Soo
authors.initials: HS
authors.lastname: Choi
keywords: Cucumber mosaic virus; Vigna angularis var. nipponensis; subgroup I