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Int J Syst Evol Microbiol 59 (2009), 1630-1634; DOI  10.1099/ijs.0.004812-0
© 2009 International Union of Microbiological Societies

Roseomonas frigidaquae sp. nov., isolated from a water-cooling system

Mi Sun Kim1, Keun Sik Baik1, Seong Chan Park1, Moon Soo Rhee2, Hee-Mock Oh2 and Chi Nam Seong1

1 Department of Biology, College of Life Science and Natural Resources, Sunchon National University, Suncheon 540-742, Republic of Korea
2 Korean Collection for Type Cultures, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-600, Republic of Korea

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

A non-motile, coccobacilli-shaped, pale-pink-pigmented bacterium, designated strain CW67T, was isolated from a water-cooling system in Gwangyang, Republic of Korea. Cells were found to be Gram-negative, catalase-positive and oxidase-positive, the major fatty acids were C18 : 1{omega}7c (43.6 %) and C16 : 0 (15.8 %), the predominant respiratory lipoquinone was Q-10 and the DNA G+C content was 69.5 mol%. A phylogenetic tree based on 16S rRNA gene sequence comparisons showed that strain CW67T forms an evolutionary lineage within the radiation of the genus Roseomonas and that its closest relative is Roseomonas gilardii subsp. rosea MDA5605T (94.7 % sequence similarity). Evidence from this polyphasic study showed that strain CW67T could not be assigned to any recognized species. It therefore represents a novel species, for which the name Roseomonas frigidaquae sp. nov. is proposed, with CW67T (=KCTC 22211T =JCM 15073T) as the type strain.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CW67T is EU290160.

A scanning electron micrograph, a Fitch–Margoliash phylogenetic tree based on 16S rRNA gene sequences and cellular fatty acid profiles of strain CW67T and related strains are available as supplementary material with the online version of this paper.






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