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Vibrio ruber sp. nov., a red, facultatively anaerobic, marine bacterium isolated from sea water

¹ Institute of Oceanography, National Taiwan University, PO Box 23-13, Taipei, Taiwan
² Institute of Botany, Academy Sinica, Nankang, Taipei, Taiwan

Correspondence
Wung Yang Shieh
winyang{at}ms.cc.ntu.edu.tw

A red, heterotrophic, marine bacterium, designated strain VR1^T, was isolated from a sea-water sample collected in the shallow coastal region of Keelung, Taiwan. Cells of the novel strain were facultatively anaerobic, Gram-negative rods that were motile by means of a polar flagellum. The strain grew optimally at 25–30 °C and pH 6–7. Growth required the presence of NaCl, the optimal concentration being about 2 %. The red pigment produced by the cells was identified as prodigiosin. Strain VR1^T grew anaerobically by fermenting glucose and other carbohydrates and producing acids and gases. The strain did not require either vitamins or other organic growth factors for growth. It contained 2-OH-16 : 0 and 3-OH-14 : 0 as the major cellular fatty acids. The DNA G+C content was 45·8 mol%. Phenotypic and chemotaxonomic characterization indicated that strain VR1^T represents a novel species in the genus Vibrio. Strain VR1^T is phenotypically similar to Vibrio gazogenes. However, the reduction of nitrate to nitrite, the ability to utilize D-arabinose, melibiose and L-glycine as sole carbon sources, the inability to utilize sorbitol as a sole carbon source, resistance to O/129 and susceptibility to erythromycin and novobiocin allow differentiation between V. gazogenes and strain VR1^T. The name Vibrio ruber sp. nov. is proposed for the novel species, with strain VR1^T (=CCRC 17186^T =JCM 11486^T) as the type strain.

Published online ahead of print on 23 August 2002 as DOI 10.1099/ijs.0.02307-0.

The GenBank accession number for the 16S rDNA sequence of Vibrio ruber VR1^T is AF462458.

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