Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Research on the Diversity of Intestinal Microbial Communities of Red tilefish (Branchiostegus japonicus) by 16S rDNA Sequence Analysis

16S rDNA 염기서열 분석에 의한 옥돔(Branchiostegus japonicus)의 장내미생물 군집의 다양성 조사

  • Kim, Min-Seon (Jeju Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Lee, Seung-Jong (Jeju Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Heo, Moon-Soo (Major of Aquatic Life Medicine, Faculty of Marine Biomedical Sciences, Jeju National University)
  • 김민선 (국립수산과학원 제주수산연구소) ;
  • 이승종 (국립수산과학원 제주수산연구소) ;
  • 허문수 (제주대학교 해양과학대학 수산생명의학과)
  • Received : 2017.10.30
  • Accepted : 2017.11.28
  • Published : 2018.03.30
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Abstract

This study investigated the diversity of communities of intestinal microorganisms, separated from the intestinal organs of Red tilefish (Branchiostegus japonicas), collected on the Jeju Coast. First, in the isolation of 1.5% BHIA, MA, TSA and R2A Agar on the medium, there were most colonies in 1.5% BHIA. The results of aerobic culture and anaerobic culture were $1.7{\times}10^6CFU/g^{-1}$ and $1.1{\times}10^5cfu/g^{-1}$, respectively, on average, and 147 pure colonies were separated in total. In 16S rDNA sequencing, there were 58 genera and 74 species, showing 95-100% similarity with the basic strain. They were divided broadly into 5 phyla, and as the main phyletic group, Proteobacteria phylum comprised 50% with 9 families, 35 genera and 35 species of Moraxellaceae, Rhodobacteraceae, Shewanellae, Halomondaceae, Enterobacteriaceae, Vibrionaceae, Hahellaceae, Pseudomonadaceae, and Erythrobacteraceae, with the highest index of dominance. Actinobacteria phylum comprised 24% with 8 families, 11 genera and 17 species of Microbacteriaceae, Intrasporangiaceae, Dietziaceae, Dermabacteraceae, Dermacoccaceae, Nocardiodaceae, Brevibacteriaceae and Propionobacteriacea; Firmicutes phylum, 16% with 6 families, 8 genera and 17 species of Bacillaceae, Staphylcoccaceae, Planococcaceae, Streptococcaceae, Paenibacillaceae and Clostridiaceae; Bacteroidetes phylum, 6% with 2 families, 3 genera and 4 species of Cyclobacteriaceae and Flavobacteriaceae; and Deinococcus-Thermus phylum, 4% with 1 family, 1 genus and 1 species of Deinococcaceae.

본 연구는 제주연안에서 채집한 옥돔(Branchiostegus japonicus)의 장내기관으로부터 장내미생물의 분리하여 다양성을 조사하였다. 1차로 1.5% BHIA, MA, TSA 및 R2A agar 배지상 순수분리한 결과, 1.5% BHIA에서 가장 많은 colony개수를 나타냈다. 호기성, 혐기배양은 평균 $1.7{\times}10^6CFU/g^{-1}$, $1.1{\times}10^5CFU/g^{-1}$로 나타났으며 총 147개의 순수 colony가 분리되었다. 16S rDNA염기서열 분석결과 58속 74종으로 나타났으며 기본균주와 95-100%의 유사도를 나타내었다. 크게 5문(Phylum)으로 나뉘었으며, 주요 계통군으로 Proteobacteria 문이 50%로 Moraxellaceae, Rhodobacteraceae, Shewanellae, Halomondaceae, Enterobacteriaceae, Vibrionaceae, Hahellaceae, Pseudomonadaceae, Erythrobacteraceae 총 9과 35속 35종으로 우점도가 제일 높게 나타났다. Actinobacteria문은 24%, Microbacteriaceae, Intrasporangiaceae, Dietziaceae, Dermabacteraceae, Dermacoccaceae, Nocardiodaceae, Brevibacteriaceae, Propionobacteriacea 총 8과 11속 17종, Frimicutes문은 16%, Bacillaceae, Staphylcoccaceae, Planococcaceae, Streptococcaceae, Paenibacillaceae, Clostridiaceae 총 6과 8속 17종, bacteroidetes문은 6%, Cyclobacteriaceae, Flavobacteriaceae 총 2과 3속 4종을, Deinococcus-thermus문은 4%로 Deinococcaceae 단일 1과 1속 1종으로 나타났다.

Keywords

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