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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
Correspondence
Tristan Barbeyron
barboun{at}sb-roscoff.fr
A rod-shaped, Gram-negative, chemo-organotrophic, heterotrophic, strictly aerobic, gliding bacterial strain, SW5T, capable of degrading sulphated fucans from brown algae was isolated from a water-treatment facility that recycles the effluent of an alginate-extraction plant in Landerneau (Brittany, France). Its taxonomic position was investigated by a polyphasic approach. Strain SW5T formed dark-yellow colonies, was oxidase-negative and catalase-positive and grew optimally at 25 °C and pH 7.5 and in the presence of 2.5 % (w/v) NaCl. The DNA G+C content was 34.5 mol%. Phylogenetic analysis based on the sequence of the 16S rRNA gene allocated strain SW5T to the genus Mariniflexile in the family Flavobacteriaceae, with a similarity of 98.4 % to the type strain of Mariniflexile gromovii, the only recognized Mariniflexile species. Its low level of DNA–DNA relatedness (<25 %) with the type strain of this species and differentiating phenotypic characteristics demonstrated that strain SW5T constitutes a novel Mariniflexile species, for which the name Mariniflexile fucanivorans sp. nov. is proposed. Strain SW5T (=CIP 109502T =DSM 18792T) is the type strain.
A photograph of colonies of strain SW5T on ZoBell agar and a phase-contrast micrograph of a ZoBell broth culture are available as supplementary material with the online version of this paper.
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