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Int J Syst Evol Microbiol 57 (2007), 2870-2873; DOI  10.1099/ijs.0.65302-0
© 2007 International Union of Microbiological Societies

Spirosoma rigui sp. nov., isolated from fresh water

Keun Sik Baik1, Mi Sun Kim1, Seong Chan Park1, Dong Wan Lee2, Soon Dong Lee2, Jong-Ok Ka3, Sang Ki Choi1 and Chi Nam Seong1

1 Department of Biology, College of Natural Sciences, Sunchon National University, Suncheon 540-742, Republic of Korea
2 Department of Science Education, Cheju National University, Jeju 690-756, Republic of Korea
3 Department of Agricultural Biotechnology, Seoul National University, Seoul 151-742, Republic of Korea

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

A Gram-negative, yellow-pigmented bacterium capable of gliding motility, designated strain WPCB118T, was isolated from fresh water collected from the Woopo wetland (Republic of Korea). Cells were rod-shaped and sometimes filamentous. The major fatty acids were iso-C15 : 0 2-OH and/or C16 : 1{omega}7c (45.6 %), C16 : 1{omega}5c (18.5 %), iso-C15 : 0 (9.5 %) and C16 : 0 (8.8 %). The predominant menaquinone and polar lipid were MK-7 and phosphatidylethanolamine, respectively. The DNA G+C content was 53.3 mol%. A phylogenetic tree based on 16S rRNA gene sequences showed that strain WPCB118T had an evolutionary lineage within the radiation encompassing the members of the family ‘Flexibacteraceae’, its closest neighbour being Spirosoma linguale LMG 10896T (93.7 % gene sequence similarity). Data from this polyphasic study indicated that strain WPCB118T could not be assigned to any recognized species. Strain WPCB118T represents a novel species of the genus Spirosoma, for which the name Spirosoma rigui sp. nov. is proposed. The type strain is WPCB118T (=KCTC 12531T=NBRC 101117T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain WPCB118T is EF507900.

Phase-contrast and scanning electron micrographs of cells of strain WPCB118T are available as a supplementary figure with the online version of this paper.






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Copyright © 2007 by the International Union of Microbiological Societies.