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자료유형
학술저널
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한국식물병리학회 The Plant Pathology Journal The Plant Pathology Journal 제32권 제5호
발행연도
2016.10
수록면
431 - 440 (10page)

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In 2004, bacterial spot-causing xanthomonads (BSX) were reclassified into 4 species-Xanthomonas euvesicatoria , X. vesicatoria , X. perforans , and X. gardneri . Bacterial spot disease on pepper plant in Korea is known to be caused by both X. axonopodis pv. vesicatoria and X. vesicatoria . Here, we reidentified the pathogen causing bacterial spots on pepper plant based on the new classification. Accordingly, 72 pathogenic isolates were obtained from the lesions on pepper plants at 42 different locations. All isolates were negative for pectolytic activity. Five isolates were positive for amylolytic activity. All of the Korean pepper isolates had a 32 kDa-protein unique to X. euvesicatoria and had the same band pattern of the rpoB gene as that of X. euvesicatoria and X. perforans as indicated by PCR-restriction fragment length polymorphism analysis. A phylogenetic tree of 16S rDNA sequences showed that all of the Korean pepper plant isolates fit into the same group as did all the reference strains of X. euvesicatoria and X. perforans . A phylogenetic tree of the nucleotide sequences of 3 housekeeping genes- gapA , gyrB , and lepA showed that all of the Korean pepper plant isolates fit into the same group as did all of the references strains of X. euvesicatoria . Based on the phenotypic and genotypic characteristics, we identified the pathogen as X. euvesicatoria . Neither X. vesi-catoria , the known pathogen of pepper bacterial spot, nor X. perforans , the known pathogen of tomato plant, was isolated. Thus, we suggest that the pathogen caus-ing bacterial spot disease of pepper plants in Korea is X. euvesicatoria.

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