1887

Abstract

A rod-shaped, Gram-negative, chemo-organotrophic, heterotrophic, strictly aerobic, gliding bacterial strain, SW5, 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 SW5 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 SW5 to the genus in the family , with a similarity of 98.4 % to the type strain of , the only recognized species. Its low level of DNA–DNA relatedness (<25 %) with the type strain of this species and differentiating phenotypic characteristics demonstrated that strain SW5 constitutes a novel species, for which the name sp. nov. is proposed. Strain SW5 (=CIP 109502 =DSM 18792) is the type strain.

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2008-09-01
2020-01-25
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Colonies of SW5 on ZoBell agar after 5 days of incubation at 20°C. Bar, 1 cm.

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Phase-contrast micrograph of cells of strain SW5 grown in ZoBell broth at 20°C for 2 days. Bar, 6 µm.

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