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1 GBF – German Research Centre for Biotechnology, Department of Environmental Microbiology, Mascheroder Weg 1, D-38124 Braunschweig, Germany
2 UMR 6543 CNRS and Université de Nice Sophia Antipolis, Centre de Biochimie, Parc Valrose, F-06108 Nice cedex 2, France
Correspondence
Ingrid Brettar
inb{at}gbf.de
A bacterial isolate from the Baltic Sea, BA131T, 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 Gammaproteobacteria, and showed closest phylogenetic relationships with the genera Alishewanella and Rheinheimera. The G+C content of the DNA of strain BA131T 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 : 1
7c (24–33 %), 17 : 18c (14–18 %) and 18 : 17c (9–12 %). Based on the data presented, BA131T is proposed as the type strain of a novel species of the genus Rheinheimera, Rheinheimera perlucida sp. nov. The type strain is BA131T (=LMG 23581T=CIP 109200T).
Tables detailing positive results using the API and Biolog test systems and for substrate hydrolysis of strain BA131T and micrographs of cells of strain BA131T are available as supplementary material in IJSEM Online.
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