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Pelagicola litoralis gen. nov., sp. nov., isolated from coastal water in Korea

School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, Kwanak-gu, Seoul 151-742, Republic of Korea

Correspondence
Byung Cheol Cho
bccho{at}snu.ac.kr

A Gram-negative, strictly aerobic, non-motile, club-shaped bacterial strain, designated CL-ES2^T, was isolated from coastal water from the east coast of Korea. Phylogenetic analysis of 16S rRNA gene sequences revealed that strain CL-ES2^T was related to the genera Phaeobacter (95.0–96.6 % similarity to the type strains), Leisingera (96.1 %) and Marinovum (95.6 %) in the family Rhodobacteraceae. However, strain CL-ES2^T did not form a robust clade with any species of the Roseobacter clade, instead forming a distinct subline. The optimum temperature and pH for growth were 25 °C and pH 7. Strain CL-ES2^T was able to grow with sea salts at concentrations in the range 2–6 %, with optimum growth occurring at 3–4 %. The major fatty acid was C_{18 : 1}7c (75.2 %). The polar lipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, an unidentified aminolipid and three unidentified lipids. The isoprenoid quinone was Q-10. The G+C content of the DNA was 47.0 mol%. On the basis of the data from the polyphasic analysis, strain CL-ES2^T represents a novel genus and species, for which the name Pelagicola litoralis gen. nov., sp. nov. is proposed. The type strain of Pelagicola litoralis is CL-ES2^T (=KCCM 42274^T =DSM 18290^T).

An extended neighbour-joining phylogenetic tree, a TLC of the polar lipids, micrographs of DAPI-stained cells and details of the whole-cell fatty acid composition of strain CL-ES2^T and related strains are available as supplementary material with the online version of this paper.