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Multiplex PCR Assay for the Simultaneous Detection of Major Pathogenic Bacteria in Soybean

콩에 발생하는 주요 병원세균의 동시검출을 위한 다중 PCR 방법

  • 이영훈 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 김남구 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 윤영남 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 임승택 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 김현태 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 윤홍태 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 백인열 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 이영기 (농촌진흥청 국립농업과학원)
  • Received : 2013.01.14
  • Accepted : 2013.03.18
  • Published : 2013.06.30

Abstract

Bacterial diseases in soybean are bacterial pustule by Xanthomonas axonopodis pv. glycines, wildfire by Pseudomonas syringae pv. tabaci, bacterial blight by Pseudomonas savastanoi pv. glycines and bacterial brown spot by Pseudomonas syringae pv. syringae in Korea. It is difficult to identify each disease by early symptoms in fields, because the initial symptoms of these diseases are very similar to each other. In this study, we developed multiplex PCR detection method for rapid and accurate diagnosis of bacterial diseases. The glycinecin A of X. axonopodis pv. glycines, the tabtoxin of P. syringae pv. tabaci, the coronatine of P. savastanoi pv. glycines and the syringopeptin of P. syringae pv. syringae have been reported previously. These bacteriocin or phytotoxin producing genes were targeted to design the specific diagnostic primers. The primer pairs for diagnosis of each bacterial diseases were selected without nonspecific reactions. The studies on simultaneous diagnosis method were also conducted with primarily selected 21 primers. As a result, we selected PCR primer sets for multiplex PCR. Sizes of the amplified PCR products using the multiplex PCR primer set consist of 280, 355, 563 and 815 bp, respectively. This multiplex PCR method provides a efficient, sensitive and rapid tool for the diagnosis of the bacterial diseases in soybean.

국내 콩에서 발생하는 세균병해인 불마름병, 들불병, 세균점무늬병, 세균갈색점무늬병의 다중 진단을 위한 PCR 방법을 요약하면 다음과 같다. 1. 콩에 발생하는 각각의 세균들은 서로 다른 박테리오신(bacteriocin) 이나 파이토톡신(phytotoxin)을 생산하는데 이와 관련한 유전자를 목적으로 하여 진단프라이머를 설계하였다. 2. 불마름병은 glycinecin A, 들불병은 tabtoxin, 세균점무늬병은 coronatine과 세균갈색점무늬병은 syringopeptin을 목적유전자로 하여 다중 진단프라이머 조합을 설계하였다. 3. 1차 선발로 각각의 균주에 대한 단일 진단 프라이머를 선발하였으며, 여기선 선발된 21개의 프라이머들을 조합하여 4종 다중진단프라이머 선발을 위한 2차 선발에 이용하였다. 최종적으로 280 bp의 불마름병, 355 bp의 세균갈색점무늬병, 563 bp의 들불병과 815 bp의 세균점무늬병으로 구성된 다중진단 프라이머 조합이 개발되었다. 4. 선발된 4종 다중 진단 프라이머 조합의 경우 다른 세균들과의 비특이적 반응이 있는지 확인하기 위한 3차 선발을 거쳐 그 특이성을 검증하였다.

Keywords

References

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