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Biological and Molecular Characterization of a Korean Isolate of Cucurbit aphid-borne yellows virus Infecting Cucumis Species in Korea.

Authors
  • Choi, Seung-Kook1
  • Yoon, Ju-Yeon1
  • Choi, Gug-Seoun1
  • 1 Virology Unit, Department of Horticultural Environment, National Institute of Horticultural and Herbal Science, RDA, Wanju 565-852, Korea. , (North Korea)
Type
Published Article
Journal
The Plant Pathology Journal
Publisher
Korean Society of Plant Pathology
Publication Date
Dec 01, 2015
Volume
31
Issue
4
Pages
371–378
Identifiers
DOI: 10.5423/PPJ.OA.06.2015.0103
PMID: 26673519
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Surveys of yellowing viruses in plastic tunnels and in open field crops of melon (Cucumis melo cultivar catalupo), oriental melon (C. melo cultivar oriental melon), and cucumber (C. sativus) were carried out in two melon-growing areas in 2014, Korea. Severe yellowing symptoms on older leaves of melon and chlorotic spots on younger leaves of melon were observed in the plastic tunnels. The symptoms were widespread and included initial chlorotic lesions followed by yellowing of whole leaves and thickening of older leaves. RT-PCR analysis using total RNA extracted from diseased leaves did not show any synthesized products for four cucurbit-infecting viruses; Beet pseudo-yellows virus, Cucumber mosaic virus, Cucurbit yellows stunting disorder virus, and Melon necrotic spot virus. Virus identification using RT-PCR showed Cucurbit aphid-borne yellows Virus (CABYV) was largely distributed in melon, oriental melon and cucumber. This result was verified by aphid (Aphis gossypii) transmission of CABYV. The complete coat protein (CP) gene amplified from melon was cloned and sequenced. The CP gene nucleotide and the deduced amino acid sequence comparisons as well as phylogenetic tree analysis of CABYV CPs showed that the CABYV isolates were undivided into subgroups. Although the low incidence of CABYV in infections to cucurbit crops in this survey, CABYV may become an important treat for cucurbit crops in many different regions in Korea, suggesting that CABYV should be taken into account in disease control of cucurbit crops in Korea.

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