Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Streptomycin Resistant Genes of Pseudomonas syringae pv. syringae, the Causal Agent of Bacterial Blossom Blight of Kiwifruit

참다래 꽃썩음병 병원세균(Pseudomonas syringae pv. syringae)의 스트렙토마이신 저항성 유전자

  • Published : 2007.08.01
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Abstract

A total of 41 Pseudomonas syringae pv. syringae, the causal agent of bacterial blossom blight, were isolated from kiwifruit plants in Korea. Among them, two strains showing streptomycin resistance were examined to investigate the structure of resistant determinants by PCR and nucleotide sequence analysis. PCR results suggested that the streptomycin resistance is mediated by strA-strB genes carried on Tn5393a. Insertion sequences, IS6100 and IS1133, which were located within or downstream of tnpR gene in Xanthomonas campestris and Erwinia amylovora were not found. Nucleotide sequences of strA-strB were 100% identical with Tn5393a. Two stretomycin resistant strains had three plasmids. Southern blot hybridization using strA-strB probe indicated that the resistant genes were carried on a 100kb plasmid.

우리나라 참다래 과수원에서 참다래 꽃썩음병을 일으키는 원인 세균인 Pseudomonas syringae pv. syringae를 분리하였다. 총 41개 균주 중 스트렙토마이신 저항성을 보이는 2개의 균주를 대상으로 PCR과 염기서열 결정을 통해 저항성 유전자 구조를 조사하였다. PCR결과 스트렙토마이신 저항성유전자는 Tn5359a에 들어 있는 strA-strB 구조인 것으로 밝혀졌다. Xanthomonas campestris와 Erwinia amylovora에서 알려진 IS6100과 IS1133은 발견되지 않았다. strA-strB의 염기서열은 이미 밝혀진 Tn5393a와 동일하였다. 두 스트렙토마이신 저항성 균주는 각각 3개의 플라스미드를 가지고 있었으며 저항성 유전자는 그 중 100kb의 플라스미드에 들어 있었다.

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References

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