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Colwellia aestuarii sp. nov., isolated from a tidal flat sediment in Korea

Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, South Korea

Correspondence
Jung-Hoon Yoon
jhyoon{at}kribb.re.kr

A novel Colwellia-like bacterial strain, SMK-10^T, was isolated from a tidal flat sediment in Korea and subjected to a polyphasic taxonomic analysis. Cells of strain SMK-10^T were Gram-negative, motile, greyish yellow-pigmented, curved rods. Optimal growth occurred at 25–30 °C and in the presence of 2–3 % (w/v) NaCl. Strain SMK-10^T contained Q-8 as the predominant ubiquinone and C_{16 : 1}7c and/or iso-C_{15 : 0} 2-OH, C_{17 : 1}, C_{15 : 1} and iso-C_{16 : 0} as major fatty acids. The DNA G+C content was 39·3 mol%. Phylogenetic trees based on 16S rRNA gene sequence analysis showed that strain SMK-10^T belonged to the genus Colwellia. 16S rRNA gene sequence similarity values (94·7–96·7 %) to the type strains of all other Colwellia species and various differential phenotypic properties were sufficient to distinguish strain SMK-10^T from recognized Colwellia species. On the basis of its phenotypic properties and phylogenetic distinctiveness, strain SMK-10^T (=KCTC 12480^T=DSM 17314^T) is classified as the type strain of a novel Colwellia species, for which the name Colwellia aestuarii sp. nov. is proposed.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain SMK-10^T is DQ055844.

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