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Erythrobacter aquimaris sp. nov., isolated from sea water of a tidal flat of the Yellow Sea in Korea

¹ Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea
² Department of Food and Life Science, Sungkyunkwan University, Chunchun-dong 300, Jangan-gu, Suwon, Korea

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

Three Gram-negative, non-motile, non-spore-forming, slightly halophilic rods (strains SW-110^T, SW-116 and SW-140) were isolated from sea water of a tidal flat of the Yellow Sea in Korea and subjected to a polyphasic taxonomic study. The three isolates did not produce bacteriochlorophyll a and were characterized chemotaxonomically by having ubiquinone-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 content of the three isolates was between 62·2 and 62·9 mol%. Strains SW-110^T, SW-116 and SW-140 showed no difference in their 16S rRNA gene sequences, and their mean level of DNA–DNA relatedness was 94·8 %. Phylogenetic analyses based on 16S rRNA gene sequences showed that the three strains form a distinct phylogenetic lineage within the cluster comprising Erythrobacter species. Similarities between the 16S rRNA gene sequences of strains SW-110^T, SW-116 and SW-140 and the type strains of Erythrobacter species ranged from 98·4 % (with Erythrobacter longus) to 97·7 % (with Erythrobacter flavus). Levels of DNA–DNA relatedness between strains SW-110^T, SW-116 and SW-140 and the type strains of all recognized Erythrobacter species were in the range 5·3–12·7 %. On the basis of polyphasic taxonomic data, strains SW-110^T, SW-116 and SW-140 were classified as a novel Erythrobacter species, for which the name Erythrobacter aquimaris sp. nov. is proposed. The type strain is SW-110^T (=KCCM 41818^T=JCM 12189^T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains SW-110^T, SW-116 and SW-140 are AY461441, AY461442 and AY461443, respectively.

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