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Phaeobacter daeponensis 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

A Gram-negative, motile and egg-shaped bacterium, strain TF-218^T, was isolated from a tidal flat at Daepo Beach (Yellow Sea), Korea, and subjected to a polyphasic taxonomic analysis. Strain TF-218^T grew optimally at pH 7.0–8.0 and 37 °C in the presence of 2 % (w/v) NaCl. It contained Q-10 as the predominant ubiquinone and C_{18 : 1}7c and 11-methyl C_{18 : 1}7c as the major fatty acids. The major polar lipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, two unidentified lipids and an aminolipid. The DNA G+C content was 64.9 mol%. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain TF-218^T is phylogenetically closely related to the genera Phaeobacter, Leisingera and Marinovum of the Alphaproteobacteria. The phylogenetic and chemotaxonomic similarities suggest that strain TF-218^T represents a member of the genus Phaeobacter. DNA–DNA relatedness data and differential phenotypic properties, together with the phylogenetic distinctiveness, demonstrated that strain TF-218^T differs from the recognized Phaeobacter species. On the basis of the phenotypic, chemotaxonomic and phylogenetic data, strain TF-218^T represents a novel species of the genus Phaeobacter, for which the name Phaeobacter daeponensis sp. nov. is proposed. The type strain is TF-218^T (=KCTC 12794^T=JCM 13606^T).

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