1887

Abstract

Two Gram-negative, motile, non-spore-forming, bacteriochlorophyll -containing slightly halophilic strains, SW-132 and SW-158, were isolated from sea water of the East Sea in Korea, and subjected to a polyphasic taxonomic study. The two isolates were characterized chemotaxonomically as having Q-10 as the predominant respiratory lipoquinone and major amounts of unsaturated fatty acids C 7 and C 6. The DNA G+C contents of the two strains were in the range 66·8–65·9 mol%. The 16S rRNA gene sequences of strains SW-132 and SW-158 were 99·9 % (1 nt difference) similar and their mean level of DNA–DNA relatedness was 86 %. The 16S rRNA gene sequence analysis showed that strains SW-132 and SW-158 are phylogenetically closely related to species and . Similarities between the 16S rRNA gene sequences of strains SW-132 and SW-158 and the type strains of species and ranged from 97·8 to 99·0 %. DNA–DNA relatedness data indicated that strains SW-132 and SW-158 are members of a genomic species that is separate from the four species. On the basis of phenotypic and phylogenetic data and genetic distinctiveness, strains SW-132 (=KCTC 12229=DSM 16220) and SW-158 (=KCTC 12230) are classified as a novel species, for which the name sp. nov. is proposed.

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2004-11-01
2024-03-29
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