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Jannaschia rubra sp. nov., a red-pigmented bacterium isolated from sea water

¹ Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, València, Spain
² Departamento de Microbiología y Ecología, Facultad de Biología, Universitat de València, Campus de Burjassot, 46100 València, Spain
³ Colección Española de Cultivos Tipo (CECT), Facultad de Biología, Universitat de València, Campus de Burjassot, 46100 València, Spain
⁴ Lehrstuhl für Mikrobiologie, Technische Universität München, Am Hochanger 4, D-85350 Freising, Germany

Correspondence
M. J. Pujalte
maria.j.pujalte{at}uv.es

A Gram-negative, slightly halophilic, strictly aerobic, chemo-organotrophic bacterium was isolated from Mediterranean sea water near Valencia (Spain). Comparison of the almost complete 16S rRNA gene sequence showed that strain 4SM3^T belonged to the Roseobacter group, with Jannaschia helgolandensis as its closest relative, with a similarity of 98·7 %. DNA–DNA hybridization analysis showed that the Mediterranean isolate had a level of relatedness of less than 42 % with J. helgolandensis and therefore that it represented a novel species of the genus Jannaschia. Phenotypic characteristics gave further evidence that the two organisms are not related at the species level. Isolate 4SM3^T grows on solid media as irregular pink–red colonies that penetrate into the agar. Cells are rods, motile by a tuft of polar flagella. The DNA base composition is 64·6 mol% G+C. Morphological, physiological and genotypic differences from related species support the description of a novel species, Jannaschia rubra sp. nov., with strain 4SM3^T (=CECT 5088^T=DSM 16279^T) as the type strain.

Published online ahead of print on 8 October 2004 as DOI 10.1099/ijs.0.63412-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Jannaschia rubra 4SM3^T is AJ748747.

Transmission and scanning electron micrographs of cells of strain 4SM3^T are available as supplementary material in IJSEM Online.

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