Proceedings of the Korean Society of Plant Pathology Conference (한국식물병리학회:학술대회논문집)

The Korean Society of Plant Pathology (한국식물병리학회)
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Isolation and characterization of native plasmids carrying avirulence genes in Xanthomonas spp.

  • Sunggi hen (Plant Pathology Division, National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Seungdon (Plant Pathology Division, National Institute of Agricultural Science and Technology, RDA) ;
  • Jaewoong Jee (Plant Pathology Division, National Institute of Agricultural Science and Technology, RDA) ;
  • Park, Minsun (Plant Pathology Division, National Institute of Agricultural Science and Technology, RDA)
  • Published : 2003.10.01
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Abstract

Most major plant pathogenic bacteria in Korea belong to Xanthomonas spp.. Xanthomonas oryzae pv. oryzae is a major pathogen in rice, X. campestris pv. vesicatoria in pepper, X. axonopodis pv. giycines in soybean, X. campestris pv. campestris in cabbage, and X. axonoposid pv. citri in tangerin. Host specificity of the bacterial pathogen depends on the avirulence gene in the pathogen and the corresponding resistance gene in host plants. Many avirulence genes in bacteiral pathogen located on the native plasmids. However, the presence of the native plasmids in Xanthomonas spp. was not investigated well. In order to study the host specificity, we isolated native plasmids from Xanthomonas spp. and compared those plasmids each other, The presence of the native plasmids and the characteristics of the plasmids depended on the bacterial strains. In the X. axonopodis pv. glycines, most strains carried native plasmids but some strains did not. Some strains carry about 60 kb native plasmids including 3 different aviurlence genes. We will discuss the characteristics of the native plasmids isolated from the Xanthomonas spp.

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