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Abstract

A bacterial isolate from the Baltic Sea, BA131, was characterized for its physiological and biochemical features, fatty acid profile, G+C content and phylogenetic position based on comparative 16S rRNA gene sequence analysis. The strain was isolated from surface water of the central Baltic Sea during the decay of a plankton bloom. Phylogenetic analyses of the 16S rRNA gene sequence revealed a clear affiliation with the , and showed closest phylogenetic relationships with the genera and . The G+C content of the DNA of strain BA131 was 48.9 mol%. Cells were non-pigmented, Gram-negative, rod-shaped, motile by means of a single polar flagellum and catalase- and oxidase-positive. Growth was observed at salinities from 0 to 8 %, with an optimum at 1–3 %. Temperature for growth ranged from 4 to 37 °C, with an optimum around 25 °C. The fatty acids were dominated by 16 : 0 (17–18 %) and by unsaturated compounds (>61 % of the total): 16 : 17 (24–33 %), 17 : 18 (14–18 %) and 18 : 17 (9–12 %). Based on the data presented, BA131 is proposed as the type strain of a novel species of the genus , sp. nov. The type strain is BA131 (=LMG 23581=CIP 109200).

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2006-09-01
2020-01-22
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Positive results obtained in API and BIOLOG tests and tests for substrate hydrolysis for strain BA131 . [ PDF] (28 KB)

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Cells of strain BA131 as visualized after after Pt/C shadow casting by electron microscopy (a) and by phase contrast microscopy (b). Cells shown were grown in half-strength marine broth (Difco) until the exponential growth phase.

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Cells of strain BA131 as visualized after after Pt/C shadow casting by electron microscopy (a) and by phase contrast microscopy (b). Cells shown were grown in half-strength marine broth (Difco) until the exponential growth phase.

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