Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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One-step Multiplex RT-PCR Method for Simultaneous Detection of Seed Transmissible Bacterium and Virus Occurring on Brassicaceae Crop Seeds

십자화과 작물 종자에서 종자전염 세균 및 바이러스 동시 검출을 위한 One-step Multiplex RT-PCR 방법

  • Jeong, Kyu-Sik (Variety Testing Division, Korea Seed and Variety Service) ;
  • Soh, Eun-Hee (Variety Testing Division, Korea Seed and Variety Service)
  • 정규식 (국립종자원 재배시험과) ;
  • 소은희 (국립종자원 재배시험과)
  • Received : 2011.02.09
  • Accepted : 2011.02.17
  • Published : 2011.04.30
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Abstract

The aim of this research was to develop specific and sensitive PCR-based procedures for simultaneous detection of economically important plant pathogenic bacteria and seed borne virus in commercial Brassicaceae crop seeds, Xanthomonns campestris pv. campestris (Xcc) and Lettuce Mosaic Virus (LMV). Bacterial and virus diseases of Brassicaceae leaves are responsible for heavy losses. PCR with arbitral primers: selection of specific primers, performance of PCR with specific primers and determination of the threshold level for pathogens detection. To detect simultaneously the Xcc and LMV in commercial Brassicaceae crop seeds (lettuce, kohlrabi, radish, chinese cabbage and cabbage), two pairs of specific primer (LMV-F/R, Xcc-F/R) were synthesized by using primer-blast program (http://www.ncbi.nlm.nih.gov/tools/primer-blast/). The multiplex PCR for the two pathogens in Brassicaceae crop seeds could detect specifically without interference among primers and/or cDNA of other plant pathogens. The pathogen detection limit was determined at 1 ng of RNA extracted from pathogens. In the total PCR results for pathogen detection using commercial kohlrabi (10 varieties), lettuce (50 varieties), radish (20 varieties), chinese cabbage (20 varieties) and cabbage (20 varieties), LMV and Xcc were detected from 39 and 2 varieties, respectively. In the PCR result of lettuce, LMV and Xcc were simultaneously detected in 8 varieties.

우리나라에서 주로 재배되는 십자화과 작물(상추, 콜라비, 무, 배추, 양배추)의 종자 전염 병원균 중에서 세균성 병원균 Xanthomonns campestris pv. campestris(Xcc)와 바이러스 병원균 Lettuce Mosaic Virus(LMV)를 종자에서 동시검출하기 위한 One-step multiplex RT-PCR을 개발하였다. 각각의 병원균을 특이적으로 증폭시키는 병원균 검출용 프라이머 2종(Xcc-F/R, LMV-F/R)을 primerblast 프로그램을 이용하여 제작하였고 이들 프라이머 세트는 프라이머간 또는 병원균 cDNA간의 간섭없이 특이적으로 타겟 병원균만을 검출하였다. PCR을 이용한 병원균의 검출 최소 민감도는 1 ng이었다. 십자화과 작물중에서 유통 중인 콜라비 10품종, 상추 50품종, 무 20품종, 배추 20품종 그리고 양배추 20품종에 대한 종자 감염 병원균 검출을 위한 One-step multiplex RT-PCR 수행 결과, LMV는 전체 120품종 중에서 39품종에서 검출되었고, Xcc는 2개 품종에서 검출되었다. 그리고 50품종의 상추 종자 시료 중에 8품종의 시료에서 LMV와 Xcc가 동시 검출되었다.

Keywords

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