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Development of Species-Specific Primers for Plasmodiophora brassicae, Clubroot Pathogen of Kimchi Cabbage

배추 뿌리혹병균 Plasmodiophora brassicae의 종 특이적 프라이머 개발

  • Choi, Jin Su (Department of Applied Biology, Chungnam National University) ;
  • Yang, Seul Gi (Department of Applied Biology, Chungnam National University) ;
  • Song, Jeong Young (Department of Applied Biology, Chungnam National University) ;
  • Kim, Hong Gi (Department of Applied Biology, Chungnam National University)
  • 최진수 (충남대학교 응용생물학과) ;
  • 양슬기 (충남대학교 응용생물학과) ;
  • 송정영 (충남대학교 응용생물학과) ;
  • 김홍기 (충남대학교 응용생물학과)
  • Received : 2012.11.29
  • Accepted : 2014.02.21
  • Published : 2014.03.31

Abstract

Clubroot caused by the obligate biotrophic protist Plasmodiophora brassicae Woronin is one of the most damaging diseases of Brassicaceae family. In this study, we developed species-specific primer sets for rapid and accurate detection of P. brassicae. The primer sets developed amplified a specific fragment only from P. brassicae DNA while they did not amplify a band from 10 other soilborne pathogens or from Kimchi cabbage. In sensitivity test, the species-specific primer set ITS1-1/ITS1-2 could work for approximately 10 spores/ml of genomic DNA showing more sensitivity and accuracy than previous methods. With quantitative real-time PCR test, the primer set detected less spores of P. brassicae than before, confirming that the species-specific primer set could be useful for rapid and accurate detection of P. brassicae.

Plasmodiophora brassicae는 십자화과 작물에 뿌리혹병을 일으키는 주요 병원균이다. 본 연구에서는 뿌리혹병균의 신속 정확한 검출을 위해서 뿌리혹병균에 대한 새로운 종 특이적 프라이머를 개발하고자 하였다. 새롭게 개발된 프라이머들은 10종의 주요 토양병원균을 비롯하여 기주인 배추 DNA와는 반응하지 않고 P. brassicae와만 반응하는 특이성을 갖고 있었다. 그 가운데 Primer ITS1-1/1-2는 민감도 검정 결과, 10 spores/ml의 DNA까지 검출이 가능함으로써, first round PCR용임에도 불구하고 이전의 검출법 보다 감도가 높고 정확한 결과를 얻었다. Quantitative real-time PCR로 분석할 경우에는 더 적은 수의 포자까지 안정적으로 검출해 낼 수 있어 새로운 P. brassicae 종 특이적 프라이머로서의 유용성을 확인할 수 있었다.

Keywords

References

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