Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Taxonomic characteristics of novel Flavobacteriumsp. B1 from a freshwater pond

  • Bae, Young-Min (Department of Life Science and Public Health, Changwon University)
  • Received : 2022.07.31
  • Accepted : 2022.10.11
  • Published : 2022.10.30
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Abstract

The genus Flavobacterium, type genus of the family Flavobacteriaceae and a member of the phylum Bacteriodetes includes gram-negative and yellow-pigmented rods. Those bacteria have been isolated from various environments of the earth. A yellow-pigmented, gram-negative rod was isolated from a pond in the campus of the Changwon University, Changwon, Kyeongnam and designated as strain B1. Strain B1 was further analyzed physiologically, biochemically and phylogenetically, and concluded to be a member of genus Flavobacterium. BLAST search of the 16S rRNA gene sequence of strain B1 shows homology no higher than 99.0% with those sequences of other bacteria. The major fatty acids of strain B1 are iso-C15:0 (19.6%), summed feature 3(C16:1 ω7c and/or C16:1 ω6c, 16.1%), iso-C17:0 3OH(10.2%), iso-C15:0 3OH(8.4%) and iso-C15:1 G(6.6%) showing significant differences in fatty acid compositions between strain B1 and the other known Flavobacterium species. DNA sequence of 16S rRNA gene of strain B1 was deposited in genbank under accession number OP060681.

Flavobacterium 속(genus)은 Bacteriodetes 문(phylum), Flavobacteriaceae 과(family)의 대표속(type genus)으로서, 이 속의 세균들은 황색 색소를 함유하는 그람 음성 간균이다. 이 속 세균들은 자연계의 다양한 환경에서 분리되고 있다. 황색색소를 함유하는 그람음성 간균이 경남 창원시 소재 창원대학교 교내의 연못에서 분리되었고, 이 세균은 균주 B1으로 명명되었다. 균주 B1을 생리학적, 생화학적 및 계통분석학적으로 분석한 결과, Flavobacterium 속에 속하는 것으로 결론지어졌다. 이 세균의 16S rRNA 유전자 염기서열을 BLAST로 분석해 본 결과, 다른 어떠한 세균과도 16S rRNA 유전자 염기서열의 상동성이 99.0%를 넘지 않았다. 균주 B1의 주된 지방산은 iso-C15:0(19.6%), summed feature 3(C16:1 ω7c and/or C16:1 ω6c, 16.1%), iso-CC17:0 3OH(10.2%), iso-C15:0 3OH(8.4%) 및 iso-C15:1 G(6.6%)인 것으로 밝혀졌는데, 이는 다른 Flavobacterium 종들의 지방산 함량과 확연한 차이가 있는 것을 알 수 있었다. 이 세균의 16S rDNA 염기서열은 genbank에 accession number OP060681로 등록되었다.

Keywords

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