Detection of Nocardia sp. Hl7-1 by PCR during Bioremediation of Crude Oil-Contaminated Soil

원유 오염토양의 Bioremediation과정 동안 PCR을 이용한 Nocardia sp. Hl7-1의 검출

  • Baek, Kyung-Hwa (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience & Biotechnology, Ecology Laboratory, Ewha Womans University) ;
  • Lee, Young-Ki (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience & Biotechnology) ;
  • Lee, In-Sook (Ecology Laboratory, Ewha Womans University) ;
  • Oh, Hee-Mock (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience & Biotechnology) ;
  • Yoon, Byung-Dae (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience & Biotechnology) ;
  • Kim, Hee-Sik (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience & Biotechnology)
  • Published : 2004.03.01

Abstract

For the detection of the oil-degrading bacterium, Nocardia sp. Hl7-1, inoculated during the bioremediation of oil-contaminated soil, a species-specific primer was constructed based on the 16S rDNA sequence of this strain. Two forward primers and two reverse primers were designed and tested against both closely and distantly related bacterial strains. All the primers designed were specific to the Nocardia sp. H17-1. Particularly, primer sets NH169F-NH972R and NH575F-NH972R could be used to detect 50 fg of template DNA and TEX>$1.2${\times}$10^4$ CFU/g of sandy soil. These two PCR primer sets successfully detected the H 17-1 strain in the oil-con-laminated soil samples containing heterogeneous DNA. We also conformed the primer specificity by restriction-enzyme cleavage of the PCR products and denaturing gradient gel electrophoresis.

원유로 오염된 토양의 생물학적 복원과정 동안 접종된 Nocardia sp. Hl7-1 균주를 확인하기 위해 165 rDNA sequence에 기초하여 균주에 특이적인 primer를 제작하였다 14균주의 16S rDNA sequence비교를 통해 제작된 4개의 primer set는 Hl7-1 균주를 특이적으로 검출할 수 있었다. 특히 NH169F-NH972R과 NH575F-NH972R의 primer set는 50 fg의 DNA와 $1.2${\times}$10^4$ cfu/g-soil의 균체농도까지 민감하게 검출할 수 있었다. 이 두 primer set는 원유로 오염된 토양의 bioremediation과정 동안 접종된 Hl7-1 균주의 특이적 검출을 가능케 하였으며, 이는 사용된 primer set에 의해 증폭된 PCR산물을 제한효소(EcoRI)로 절단한 결과와 DGGE를 통한 Hl7-1 균주의 확인을 통해 본 연구에서 제작된 primer set의 특이성을 검증하였다.

Keywords

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