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1 GBF German Research Centre for Biotechnology, Dept Environmental Microbiology, Mascheroder Weg 1, D-38124 Braunschweig, Germany
2 UMR 6543 CNRS and Université Nice Sophia Antipolis, Centre de Biochimie, Parc Valrose, F-06108 Nice, France
Correspondence
Ingrid Brettar
inb{at}gbf.de
Two bacterial isolates from the Baltic Sea, BA1 and BA134T, were characterized for their physiological and biochemical features, fatty acid profiles and phylogenetic position based on 16S rRNA gene sequences. The strains were isolated from surface water of the central Baltic Sea during the decay of a plankton bloom. Phylogenetic analysis of their 16S rRNA gene sequences revealed a clear affiliation to the family Flexibacteriaceae and showed highest sequence similarity (91 %) to Cyclobacterium marinum. The G+C content of the DNA was 35·4 mol%. The strains were pink-coloured due to carotinoids, Gram-negative, rod-shaped and catalase- and oxidase-positive. Growth was observed at 06 % salinity, with good growth at 03 %. Temperature for growth was 437 °C, with an optimum around 25 °C. The fatty acid profiles were dominated by branched-chain fatty acids (70 %), with a high abundance of iso-C15 : 0 (2933 %), iso-C17 : 1
9c (710 %) and C17 : 1
6c (510 %). According to their morphology, physiology, fatty acid composition, 16S rRNA gene sequences and DNADNA similarity, on one hand, the described bacteria are considered to be members of the same novel species; on the other hand, they are suggested as a novel genus of the family Flexibacteriaceae. To honour the late aquatic microbiologist Russell T. Bell, the name Belliella baltica gen. nov, sp. nov. is suggested for the Baltic Sea isolates, for which the type strain is BA134T (=DSM 15883T=LMG 21964T=CIP 108006T).
Published online ahead of print on 8 August 2003 as DOI 10.1099/ijs.0.02752-0.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains BA134T and BA1 are AJ564643 and AJ564642, respectively.
A phase-contrast micrograph of cells of strain BA134T and tables showing the API test results and fatty acid profiles are available as supplementary material in IJSEM Online.
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