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Abstract

A bacterial isolate from the Baltic Sea, designated strain BA141, was characterized for its physiological and biochemical features, fatty acid profile, pigment spectrum, DNA G+C content and phylogenetic position based on comparative 16S rRNA gene sequence analysis. The strain was isolated from the surface of sediment in a deep basin of the central Baltic Sea. Phylogenetic analysis of the 16S rRNA gene sequence revealed a clear affiliation with the , and showed that the closest phylogenetic relationship was with the genus The G+C content of the DNA was 61.2 mol%. Cells of strain BA141 were red-pigmented, Gram-negative, pleomorphic to rod-shaped, non-motile and catalase- and oxidase-positive. Growth was observed at salinities of 0.8–6 %, with optimum growth at 1.5–3 %. The temperature range for growth was 10–37 °C, with optimum growth at 25–30 °C. The fatty acids were dominated by unsaturated fatty acids (>86 %); the number of fatty acids detected was very low, with 18 : 17 (73 %) as the predominant fatty acid; other major fatty acids were 19 : 0 cyclo 8 (10 %) and 16 : 0 (8 %). The pigment spectrum indicated the presence of carotenoids and unknown pigment(s) with an absorption maximum at 430 nm, but not bacteriochlorophyll . According to phylogenetic analysis based on the 16S rRNA gene sequence and the phenotypic features, strain BA141 represents a new genus and species. The name gen. nov., sp. nov. is proposed, with strain BA141 (=CIP 109499=LMG 24028) as the type strain.

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2007-10-01
2021-10-25
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