Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Dynamics of Bacterial Communities Analyzed by DGGE during Cyanobacterial Bloom in Daechung Reservoir, Korea

대청호 수화발생시기의 미생물 다양성 및 계통분류학적 분석

  • Ko, So-Ra (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Ahn, Chi-Yong (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Lee, Young-Ki (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Oh, Hee-Mock (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology)
  • 고소라 (한국생명공학연구원 환경바이오연구센터) ;
  • 안치용 (한국생명공학연구원 환경바이오연구센터) ;
  • 이영기 (한국생명공학연구원 환경바이오연구센터) ;
  • 오희목 (한국생명공학연구원 환경바이오연구센터)
  • Received : 2011.06.18
  • Accepted : 2011.08.13
  • Published : 2011.08.31
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Abstract

The change of microbial communities during cyanobacterial bloom was comparatively analyzed by 16S rDNA PCR-DGGE in Daechung Reservoir during 2003~2005. Morphological analysis showed that Cyanophyceae dominated algal community in the bloom. Dominant cyanobacteria were Microcystis, Planktothrix (Oscillatoria), Phormidium and Anabaena. We used 16S rDNA-denaturing gradient gel electrophoresis (DGGE) profiles and phylogenetic affiliations of the DGGE bands to analyze the community structure and diversity of the predominant microbial community. The DGGE band patterns demonstrated that the most frequent bands were identified as Microcystis during the monitoring periods, Planktothrix also dominated on September 2003 and 2004, whereas Anabaena was showed a peak on September 2005 and Aphanizomenon on August 2003. DGGE and phylogenetic analysis provided us new information that could not be obtained by traditional, morphological analysis. The relationship between cyanobacteria and other aquatic bacteria can be traced and their genetic diversity also identified in detail.

하절기 수화발생이 빈번한 대청호에서 2003~2005년(3년)에 걸쳐 분자생태학적 방법의 하나인 DGGE를 이용하여 시간에 따른 미생물 군집구조의 변화를 연구하였다. 조사기간 동안 출현한 식물플랑크톤을 형태학적으로 분류한 결과 Cyanophyceae가 우점하였고, 이중에서 Microcystis, Planktothrix (Oscillatoria), Phormidium 그리고 Anabaena 속이 크게 우점하였다. 분자적 군집분석 방법으로서 16S rDNA의 DGGE profile 분석과 계통학적 분류에 의하여 우점하는 미생물 군집의 구조와 다양성을 확인하였다. Microcystis는 조사기간 동안 지속적으로 우점하였으나, Planktothrix는 2003년과 2004년 9월에, Anabaena는 2005년 9월, 그리고 Aphanizomenon은 2003년 8월에 우점하였다. DGGE와 계통분류학적 분석방법은 형태학적 분석법에 의해 얻지 못하는 새로운 정보를 제공하며, 남조류와 수생 세균사이의 상관관계를 추정할 수 있고, 그들의 유전적 다양성을 보다 자세하게 확인할 수 있다.

Keywords

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