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Erythrobacter seohaensis sp. nov. and Erythrobacter gaetbuli sp. nov., isolated from a tidal flat of the Yellow Sea in Korea

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

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

Two Gram-negative, non-spore-forming, slightly halophilic strains, SW-135^T and SW-161^T, which were isolated from a tidal flat of the Yellow Sea in Korea, were subjected to a polyphasic taxonomic study. The two isolates lacked bacteriochlorophyll a and contained ubiquinone-10 (Q-10) as the predominant respiratory lipoquinone and C_{18 : 1}7c and C_{17 : 1}6c as the major fatty acids. The DNA G+C contents of strains SW-135^T and SW-161^T were 62·2 and 64·5 mol%, respectively. Phylogenetic analyses based on 16S rRNA gene sequences showed that the two strains fall within the radiation of the cluster comprising Erythrobacter species. Strains SW-135^T and SW-161^T exhibited a 16S rRNA gene sequence similarity value of 96·9 % and a mean DNA–DNA relatedness level of 12·3 %. Sequence similarities between strains SW-135^T and SW-161^T and the type strains of recognized Erythrobacter species ranged from 96·7 to 98·5 %. Levels of DNA–DNA relatedness were low enough to indicate that strains SW-135^T and SW-161^T represent members of two species separate from all recognized Erythrobacter species. On the basis of polyphasic taxonomic data, strains SW-135^T (=KCTC 12228^T=DSM 16221^T) and SW-161^T (=KCTC 12227^T=DSM 16225^T) were classified as two novel Erythrobacter species, for which the names Erythrobacter seohaensis sp. nov. and Erythrobacter gaetbuli sp. nov. are proposed, respectively.

Published online ahead of print on 23 July 2004 as DOI 10.1099/ijs.0.63233-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains SW-135^T and SW-161^T are AY562219 and AY562220, respectively.

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