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제주 연안의 괭생이모자반(Sargassum horneri)에서 분리된 세균의 계통학적 다양성 및 군집 구조 분석

Phylogenetic Diversity and Community Structure of Microbiome Isolated from Sargassum Horneri off the Jeju Island Coast

  • 문경미 (제주대학교 해양생명과학과) ;
  • 박소현 (제주대학교 해양생명과학과) ;
  • 허문수 (제주대학교 해양생명과학과)
  • Moon, Kyung-Mi (Marine applied Microbes and Aquatic Organism Disease Control Lab, Department of Aquatic Biomedical Sciences, School of Marine Biomedical Sciences & Marine and Environmental Research Institute, Jeju-National University) ;
  • Park, So-Hyun (Marine applied Microbes and Aquatic Organism Disease Control Lab, Department of Aquatic Biomedical Sciences, School of Marine Biomedical Sciences & Marine and Environmental Research Institute, Jeju-National University) ;
  • Heo, Moon-Soo (Marine applied Microbes and Aquatic Organism Disease Control Lab, Department of Aquatic Biomedical Sciences, School of Marine Biomedical Sciences & Marine and Environmental Research Institute, Jeju-National University)
  • 투고 : 2018.05.09
  • 심사 : 2018.06.04
  • 발행 : 2018.10.30

초록

최근 괭생이모자반(Sargassum horneri)은 제주의 해안가와 해변, 연근해 양식장 등 매년 대량으로 속출되어 인근 양식업자 및 주민에게 막대한 피해를 주고 있는 추세이다. 본 연구에서는 제주 인근 연안으로 흘러 들어온 괭생이 모자반에 서식하고 있는 미생물의 다양성을 탐색하고 동정을 통한 미생물의 기능을 파악함으로써 생태학적 문제에 관한 기초자료를 제공하고자 하였다. Proteobacteria는 분리 된 균주 중 88%를 차지한 우점문으로 ${\alpha}-proteobacteria$강은 6속 10종으로 Pseudorhodobacter속이 40%를 차지하고 Paracoccus속 20%, Rhizobium, Albirhodobacter, Skermanella 및 Novosphingobium 속은 각각 10%를 차지했다. ${\beta}-proteobactera$강은 5속 10종으로 Hydrogenophaga속이 50%, Azoarcus 20%, 나머지 Oxalicibacterium, Duganella, Xenophilus속은 각각 10%를 차지했다. ${\gamma}-proteobacteria$강은 13속 57종으로 Proteobacteria문에서 74%로 우점강을 차지했고, Shewanella는 23%, Pseudomonas속 12%, Cobetia 19%, Rahnella, Vibrio 및 Serratia속은 4%, 나머지 Rheinheimera, Raoultella, Pantoea, Acinetobacter, Moraxella 및 Psychrobacter속은 2%를 차지했다. Actinobacteria는 1속 2종으로 Gordonia와 Nocardioides속이 각각 50%를 나타냈다. Bacteroidetes문은 3속 5종으로 Lacihabitans, Mariniflexile속은 33%, 나머지 Dyadobacter, Cellulophaga와 Ferruginibacter속은 11%를 차지했다.

Recently, Sargassum horneri, the marine weed inhabiting the shoreline, beach, and littoral sea area, has caused serious damage to intensive aquaculture farms particularly those around Jeju Island, South Korea. The purpose of this study was to investigate the diversity of microorganisms in Sargassum horneri and to provide basic data on ecological problems by identifying microbial functions. A total of 88 isolates were identified by 16S rRNA sequencing. Proteobacteria was the dominant phylum accounting for 88%, including class ${\alpha}-proteobacteria$, six genera, and ten species. The dominating genus, Pseudobacter, accounted for 40% in Pseudorhodobacter, 20% in Paracoccus, and the remaining at 10% each were Rhizobium, Albirhodobacter, Skermanella, and Novosphingobium. Class ${\beta}-proteobactera$ included five genera and ten species. Genus Hydrogenophaga accounted for 50%, while genus Azoarcus accounted for 20%, and the remaining Oxalicibacterium, Duganella, and Xenophilus were 10% each. Class ${\gamma}-proteobacteria$ with 13 genera and 57 species, accounted for 74% in phylum Proteobacteria, 23% in Shewanella, 19% in Cobetia, 12% in Pseudomonas, 4% each in Vibrio and Serratia, and 2% each in Rheinheimera, Raoultella, Pantoea, Acinetobacter, Moraxella, and Psychrobacter genera. In addition, Actinobacteria with two species of Nocardioides genera accounted for 50%, and Bacteroidetes accounted for 33%, with three genera and five species that included Lacihabitans and Mariniflexile. The remaining Dyadobacter, Cellulophaga, and Ferruginibacter genera each accounted for 11%.

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