Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Korean Paddy Soil Microbial Community Analysis Method Using Denaturing Gradient Gel Electrophoresis

Denaturing gradient gel electrophoresis를 이용한 한국의 논 토양 미생물 다양성 분석 방법

  • Choe, Myeongeun (Gumi Floricultural Experiment Station, Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Hong, Sung-Jun (School of Applied Biosciences, Kyungpook National University) ;
  • Lim, Jong-Hui (School of Applied Biosciences, Kyungpook National University) ;
  • Kwak, Yunyoung (School of Applied Biosciences, Kyungpook National University) ;
  • Back, Chang-Gi (School of Applied Biosciences, Kyungpook National University) ;
  • Jung, Hee-Young (School of Applied Biosciences, Kyungpook National University) ;
  • Lee, In-Jung (School of Applied Biosciences, Kyungpook National University) ;
  • Shin, Jae-Ho (School of Applied Biosciences, Kyungpook National University)
  • Received : 2012.12.11
  • Accepted : 2013.02.21
  • Published : 2013.06.30
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Abstract

Soil microbes are important integral components of soil ecosystem which have significant and diverse role in organic matter decomposition, nitrogen cycling, and nitrogen fixation. In this study an effective denaturing gradient gel electrophoresis (DGGE) method was employed for paddy soil microbial diversity survey. For optimum paddy soil microbial DNA extraction, different methods such as Lysis buffer, skim milk bead, sodium phosphate buffer, Epicentre Soil Master DNA extraction kit (Epicentre, USA) and Mo Bio Power Soil DNA kit (MO BIO, USA) methods were utilized. Among all the method, using Mo Bio Power Soil kit was most effective. DGGE analysis of Bacteria was carried out at 6% polyacylamide gel and 45-60% denaturing gradient in the optimal conditions. Whereas DGGE analysis of fungi was done at 6% polyacrylamide gel and 45-80% denaturing gradient in the optimal conditions. By applying the above assay, it was found that variation within the microbial community of paddy soil occurs by a factor of time. DGGE assay used in this study through for a variety of soil microbial analysis suggests the potential use of this method.

현재 토양 생태에서 토양미생물은 유기물 분해, 질소 순환, 식물의 질소 이용 등 중요한 역할을 하고 있어, 토양 내 미생물 다양성을 분석하기 위한 연구는 지속적으로 진행되어 오고 있다. 본 연구에서는 논 토양의 미생물 생태 다양성을 조사하기 위한 효과적인 방법으로 denaturing gradient gel electrophoresis (DGGE)를 적용하고자 본 연구를 수행하였다. 논 토양 미생물의 DNA를 분리하기 위하여 lysis buffer method, skim milk bead method, sodium phosphate buffer method, Epicentre SoilMaster DNA extraction kit (Epicentre, USA), Mo Bio PowerSoil kit (Mo Bio, USA)를 이용하여 토양 내 gDNA 최적 추출방법을 확인하였다. 그 결과 Mo Bio PowerSoil kit를 사용하였을 때 Shannon 다양성지수가 세균 3.3870, 진균 3.6254으로 미생물 다양성 분석시에 가장 효과적이었다. DGGE 분석을 위한 조건은 세균의 경우 6% polyacylamide gel, 45-60% denaturing gradient였고, 진균의 경우 6% polyacrylamide gel, 45-80% denaturing gradient에서 최적 분석조건을 보였다. 위의 분석법을 적용하여 논 토양내의 미생물 군집의 변화를 살펴보면 시간의 변화 요인에 의해 미생물 변화가 일어나는 것을 알 수 있었다. 본 연구에서 사용된 DGGE 분석법을 통해 논토양 미생물의 분석 가능성을 제시 할 수 있었다.

Keywords

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