Novel Species Candidates Belonging to the Phyla Bacteroidetes, Firmicutes, and Actinobacteria Isolated from the Halla Mountain Wetlands

제주도 고산 습지에서 분리한 Bacteroidetes, Firmicutes, Actinobacteria 문에 속하는 신종후보 세균

  • Choi, Ah-Young (Department of Biological Sciences, Inha University) ;
  • Choi, Jae-Hee (Department of Biological Sciences, Inha University) ;
  • Kang, Ji-Young (Department of Biological Sciences, Chonbuk National University) ;
  • Choe, Jeong-Uk (Department of Bioscience and Biotechnology, Hankuk University of Foreign Studies) ;
  • Lee, Sang-Hoon (Department of Biology, Gangneung-Wonju National University) ;
  • Kim, Ha-Neul (Department of Bioscience and Biotechnology, Hankuk University of Foreign Studies) ;
  • Yi, Ha-Na (School of Biological Sciences, Seoul National University) ;
  • Shin, Young-Min (Department of Microbiology & Molecular Biology, Chungnam National University) ;
  • Jahng, Kwang-Yeop (Department of Biological Sciences, Chonbuk National University) ;
  • Lee, Hyune-Hwan (Department of Bioscience and Biotechnology, Hankuk University of Foreign Studies) ;
  • Kim, Kyu-Joong (Department of Biology, Gangneung-Wonju National University) ;
  • Joh, Ki-Seong (Department of Bioscience and Biotechnology, Hankuk University of Foreign Studies) ;
  • Chun, Jong-Sik (School of Biological Sciences, Seoul National University) ;
  • Kim, Seung-Bum (Department of Microbiology & Molecular Biology, Chungnam National University) ;
  • Cho, Jang-Cheon (Department of Biological Sciences, Inha University)
  • 최아영 (인하대학교 자연과학대학 생명과학과) ;
  • 최재희 (인하대학교 자연과학대학 생명과학과) ;
  • 강지영 (전북대학교 자연과학대학 생명과학과) ;
  • 최정욱 (한국외국어대학교 자연과학대학 생명공학과) ;
  • 이상훈 (강릉원주대학교 자연과학대학 생물학과) ;
  • 김하늘 (한국외국어대학교 자연과학대학 생명공학과) ;
  • 이하나 (서울대학교 자연과학대학 생명과학부) ;
  • 신영민 (충남대학교 생명시스템과학대학 미생물분자생명과학과) ;
  • 장광엽 (전북대학교 자연과학대학 생명과학과) ;
  • 이현환 (한국외국어대학교 자연과학대학 생명공학과) ;
  • 김규중 (강릉원주대학교 자연과학대학 생물학과) ;
  • 조기성 (한국외국어대학교 자연과학대학 생명공학과) ;
  • 천종식 (서울대학교 자연과학대학 생명과학부) ;
  • 김승범 (충남대학교 생명시스템과학대학 미생물분자생명과학과) ;
  • 조장천 (인하대학교 자연과학대학 생명과학과)
  • Received : 2011.05.20
  • Accepted : 2011.07.14
  • Published : 2011.08.31

Abstract

Although Sumunmulbangdui wetland at the Halla Mountain in Jeju Island, a kind of montane wetlands, has been considered to bear high biodiversity, no study has been reported on the bacterial diversity. In this study, soil and water samples were collected from the wetland in order to isolate novel bacterial species. Bacterial strains belonging to the phyla Bacteroidetes, Firmicutes, and Actinobacteria were isolated after spreading soil and water samples onto solid agar media. The 16S rRNA gene sequences of the strains assigned to the three phyla were compared to those of type strains of the species in the phyla. The strains that showed less than 98.7% 16S rRNA gene sequence similarity to the validly published species were considered to be novel species candidates. A total of 32 strains were regarded as novel species candidates in the phyla Bacteroidetes, Firmicutes, and Actinobacteria. Diversity of novel species candidates was very low; the candidates were confined to only few genera. In the Bacteroidetes, 13 novel candidate species were affiliated with the genera Mucilaginibacter, Sphingobacterium, Pedobacter, Flavobacterium, and Chryseobacterium. A total of 13 novel candidate species that assigned to the genera Paenibacillus Lysinibacillus, and Bacillus were identified in the phylum Firmicutes. Only two candidate species that belonged to the genera Mycobacterium and Nocardia were excavated in the Actinobacteria. Cultural, physiological, and chemotaxonomic characteristics have been determined for the novel species candidates, and the characteristics are described in this study.

제주도 한라산의 숨은물벵뒤 습지는 여러 다른 생태계에 비해 접근이 용이하지 않아 생물다양성이 높다고 여겨져 왔으나, 세균의 다양성과 새로운 종에 대한 보고는 전혀 이루어지지 않았다. 본 연구에서는 제주도 한라산의 고산 습지인 숨은물벵뒤 습지에서 담수 및 토양시료를 채취하여 Bacteroidetes, Firmicutes, Actinobacteria문에 속하는 세균을 분리하였다. 분리된 세균 중 위의 3개의 문에 속하는 균주의 16S rRNA 유전자 염기서열을 구한 다음 표준균주와 비교하였으며, 16S rRNA 유전자 염기서열의 유사도가 표준균주와 98.7% 미만인 균주를 신종후보 균주로 간주하였다. 전체적으로 과 및 속 수준의 다양성은 높지 않았으며, 특정 계통에 집중되어 신종후보 균주가 발굴되었다. Bacteroidetes 문에는 Mucilaginibacter, Sphingobacterium, Pedobacter, Flavobacterium, Chryseobacterium 속에 속하는 13개의 후보신종이 확인되었다. Firmicutes 문에는 Paenibacillus, Lysinibacillus, Bacillus 속에 해당하는 13개의 후보신종이 배양되었다. Actinobacteria 문에는 Mycobacterium과 Nocardia에 속하는 후보신종 2개가 발굴되었다. 분리된 28개의 후보신종에 대하여 배양학적 특징, 생리학적 특징, 화학분류적 특징을 조사하였으며 본 논문에 기재하였다. 종합적으로 숨은물벵뒤 습지는 아직까지 배양되지 않은 많은 수의 신종 미생물을 포함하고 있는 생태계임이 확인되었다.

Keywords

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