Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Phylogenetic Diversity and Antibacterial Activity in Bacterium from Balloon Fish (Diodon holocanthus) of Jeju Island

제주 연안의 가시복(Diodon holoanthus)에서 분리된 세균의 다양성 및 항균활성 효과

  • Moon, Chae-Yun (Department of Aquatic Biomedical Sciences, Jeju National University) ;
  • Ko, Jun-Cheol (Jeju Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Min-Seon (Jeju Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Heo, Moon-Soo (Department of Aquatic Biomedical Sciences, Jeju National University)
  • 문채윤 (제주대학교 해양과학대학 수산생명의학과) ;
  • 고준철 (국립수산과학원 제주수산연구소) ;
  • 김민선 (국립수산과학원 제주수산연구소) ;
  • 허문수 (제주대학교 해양과학대학 수산생명의학과)
  • Received : 2019.08.13
  • Accepted : 2019.11.11
  • Published : 2020.03.28
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Abstract

Over the past 20 years, global warming has transformed the marine ecosystem of the Jeju Island into a subtropical zone making it conducive to the production of tropical fishes. Recently, the balloon fish (Diodon holoanthus) has been found off the coast of the Jeju Island. In this study, we analyzed the diversity of its intestinal microorganisms as a representative for the surrounding environment. In addition, the isolates were evaluated for their antibacterial activity. A total of 161 strains of various species were identified and isolated using 16S ribosomal RNA gene sequence analysis. They were separated into three groups, of which Phylum Proteobacteria was found to be the most dominant with 91% sequence similarity. This includes the class γ-proteobacteria that is made up of twelve genera and twenty-four hundred species. The second group comprised strains of the genus Vibrio, made up of 35% Photobacteria, 32% Shewanella, and 6% Psychrobacter. It was also determined that 4% of the isolates were Acinetobacter, 3% were Enterovibrio, while Moraxella_g2 accounted for 1% of the total isolates. Class α-proteobactera includes five genera and five species; Brevundimonas, Allorhizobium, Pseudoceanicola and Erythrobcter, each accounting for 1% of the total isolates. The Firmicute strains belonged to six genera and ten species. 5% of the strains were Terribacillus, while Paenibacillus, Salinicoccus, Staphylococcus and Streptococcus accounted for 1% each of the total isolates. Actinobacteria accounted for the final phylum with strains belonging to three genera and ten species with Janibacter, Micrococcus and Isoptericola each accounting for 1% of the total isolates.

지구 온난화로 인한 제주도의 해양 생태계는 지난 20년동안 온대에서 아열대로 변화되었다. 이러한 기후 변화는 난대성 어류가 서식할 수 있는 환경이 되며, 최근 제주 연안에서는 가시복(diodon holoanthus)이 발견되고 있다. 본 연구에서는 가시복의 장내미생물의 다양성을 파악하였다. 그리고 다양한 균주 중 어류 또는 인체 유해세균 가능성을 확인하고자 항균 활성 탐색을 수행하였다. Proteobacteria는 분리 된 균주 중 91%를 차지한 우점문으로 γ-proteobacteria강은 11속 142종으로 Vibrio속 35%, Photobacterium속 32%, Shewanella속 6%, Psychrobacter속 4%, Acinetobacter속 3% 및 나머지 Enterovibrio, Moraxella_g2속이 각각 1%를 차지했다. α-proteobactera강은 5속 5종으로 Brevundimonas속, Allorhizobium속, Pseudoceanicola속, Erythrobacter속 및 Methylobacterium속이 각각 1%로 나타났다. Firmicutes문 Bacilli강은 6속 10종으로 Bacillus속 5%가 가장 높았고 나머지 Terribacillus속, Paenibacillus속, Salinicoccus속, Staphylococcus속 및 Streptococcus속은 1%로 관찰됐다. Actinobacteria문 Actinobacteria강은 3속 3종으로 Janibacter속, Micrococcus속 및 Isoptericola속이 각각 1%를 차지했다.

Keywords

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