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Int J Syst Evol Microbiol 57 (2007), 1227-1231; DOI  10.1099/ijs.0.64902-0
© 2007 International Union of Microbiological Societies

Dyadobacter koreensis sp. nov., isolated from fresh water

Keun Sik Baik1, Mi Sun Kim1, Eun Mi Kim1,2, Hyung Rak Kim1,3 and Chi Nam Seong1

1 Department of Biology, College of Natural Sciences, Sunchon National University, Suncheon 540-742, Republic of Korea
2 Department of Dental Hygiene, Gwangyang Health College, Gwangyang 545-703, Republic of Korea
3 Saint Garlo Medical Center, Suncheon 540-719, Republic of Korea

Correspondence
Chi Nam Seong
scnu{at}scnu.ac.kr

A non-motile, rod-shaped, light-yellow-pigmented bacterium, designated strain WPCB159T, was isolated from freshwater samples collected from the Woopo wetland in Korea. The cells were Gram-negative, aerobic and catalase- and oxidase-positive. The major fatty acids were C16 : 1{omega}7c (34.8 %), iso-C15 : 0 (24.2 %) and C16 : 0 (9.4 %). The DNA G+C content was 44 mol%. A phylogenetic tree based on 16S rRNA gene sequences showed that strain WPCB159T forms a lineage within the genus Dyadobacter (family ‘Flexibacteraceae’) and is closely related to Dyadobacter hamtensis HHS 11T (97.8 % sequence similarity) and to other members of the genus Dyadobacter (95.2–96.8 % sequence similarity). The phenotypic characteristics and DNA–DNA hybridization relatedness data indicate that strain WPCB159T should be distinguished from D. hamtensis HHS 11T. On the basis of the evidence presented in this study, strain WPCB159T represents a novel species of the genus Dyadobacter, for which the name Dyadobacter koreensis sp. nov. is proposed. The type strain is WPCB159T (=KCTC 12537T=NBRC 101116T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain WPCB159T is EF017660.




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