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Microbiology and Biotechnology Letters

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Microbiol. Biotechnol. Lett. 2010; 38(3): 263-272

독도 주변의 해수에서 분리한 세균의 다양성과 군집구조 분석

Bacterial Diversity and Distribution of Cultivable Bacteria Isolated from Dokdo Island

Hye-Ri Sung and Sa-Youl Ghim

School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University, 1School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University

Abstract

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One hundred sixty three strains showing different colony morphological characteristics on different concentration of marine agar (MA) plates were isolated from ambient seawater near Dokdo island. Bacterial diversity and distributions were studied by phylogenetic analysis of the partial 16S rRNA gene sequences. One hundred sixty three strains were partially sequenced and analyzed phylogenetically. They were composed of 5 phyla, of which gamma-proteobacteria (58%), alpha-proteobacteria (20%), bacteriodetes (16%) were predominant. They were affiliated with 90 species. The 16S rRNA sequence similarity of the isolates was in 93.3 to 100 % range to reported sequence data. Thirty six isolates of among them were assumed to be novel species candidates based on similarity analysis of the 16S rRNA gene sequences. Overall, Proteobacteria and Bacteriodetes of the Dokdo coastal sea water showed a high diversity.

Keywords: Dokdo, sea water, bacterial diversity, proteobacteria, bacteriodetes

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