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Int J Syst Evol Microbiol 58 (2008), 790-797; DOI  10.1099/ijs.0.65469-0
© 2008 International Union of Microbiological Societies

Description of Maribacter forsetii sp. nov., a marine Flavobacteriaceae isolated from North Sea water, and emended description of the genus Maribacter

Tristan Barbeyron1, Flavien Carpentier1, Stéphane L'Haridon2, Margarete Schüler3, Gurvan Michel1 and Rudolf Amann3

1 Centre National de la Recherche Scientifique; Université Pierre et Marie Curie-Paris 6, Unité Mixte de Recherche 7139 ‘Végétaux Marins et Biomolécules’, Station Biologique, F-29682 Roscoff Cedex (Bretagne), France
2 Centre National de la Recherche Scientifique; Université de Bretagne Occidentale, IFREMER, Unité Mixte de Recherche 6197 ‘Laboratoire de Microbiologie des Environnements Extrêmes’, IFREMER, F-29280 Plouzané (Bretagne), France
3 Max-Planck-Institut für Marine Mikrobiologie, D-28359 Bremen, Germany

Correspondence
Tristan Barbeyron
barboun{at}sb-roscoff.fr
Rudolf Amann
ramann{at}mpi-bremen.de

Three rod-shaped, Gram-negative, chemo-organotrophic, heterotrophic, strictly aerobic, gliding bacterial strains, KT02ds18-4, KT02ds18-5 and KT02ds18-6T, were isolated from North Sea surface waters near the island of Helgoland, Germany. Their taxonomic position was investigated by a polyphasic approach. The three strains were light yellow, oxidase- and catalase-positive, and grew optimally at 25 °C, at pH 7.5, and in the presence of 2.5 % (w/v) NaCl. The Chargaff's coefficient was 34.2–34.4 mol%. The three strains shared >90 % DNA–DNA relatedness and an identical 16S rRNA gene sequence. Comparative 16S rRNA gene sequence analysis allocated the three strains to the genus Maribacter in the family Flavobacteriaceae, with similarities of 97.0–97.4 % to five of the recognized Maribacter species. Their low level of DNA–DNA relatedness (<20 %) with these species and differentiating phenotypic characteristics demonstrated that they constitute a new Maribacter species for which the name Maribacter forsetii sp. nov. is proposed. Strain KT02ds18-6T (=CIP 109504T=DSM 18668T) is the type strain. An emended description of the genus Maribacter is also proposed.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of Maribacter forsetii KT02ds18-4, KT02ds18-5 and KT02ds18-6T are AM712898, AM712899 and AM712900, respectively.

Electron micrographs of strain KT02ds18-6T are available with the online version of this paper.






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