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Int J Syst Evol Microbiol 58 (2008), 2275-2281; DOI  10.1099/ijs.0.65446-0
© 2008 International Union of Microbiological Societies

Eudoraea adriatica gen. nov., sp. nov., a novel marine bacterium of the family Flavobacteriaceae

Karine Alain{dagger}, Laurent Intertaglia, Philippe Catala and Philippe Lebaron

UPMC Univ Paris 06, UMR7621, Observatoire Océanologique, F-66650 Banyuls-sur-Mer, France

Correspondence
Philippe Lebaron
philippe.lebaron{at}obs-banyuls.fr

A novel aerobic, non-motile, Gram-negative bacterium, designated AS06/20aT, was isolated from coastal waters of the Adriatic Sea and subjected to polyphasic taxonomic analysis. Cells were rod-shaped and formed non-pigmented punctiform colonies on agar plates. The novel isolate grew heterotrophically on a variety of carbon compounds, including organic acids, carbohydrates, polyols, amino acids and complex organic substrates. Cells grew at 15–33 °C (optimum 30 °C), pH 6.5–8.5 (optimum pH 7.5–8.0) and between 2 and 6 % (w/v) NaCl (optimum 2 %). The dominant fatty acids (>5 %) detected in strain AS06/20aT were iso-C15 : 1 G, iso-C15 : 0, iso-C15 : 0 3-OH, iso-C17 : 1{omega}9c and iso-C17 : 0 3-OH. The major respiratory quinone was MK-6. The G+C content of the genomic DNA was 38.9 mol%. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain AS06/20aT fell within the family Flavobacteriaceae in the phylum Bacteroidetes. Comparative 16S rRNA gene sequence analysis indicated that strain AS06/20aT was most closely related to members of the genera Zeaxanthinibacter and Robiginitalea, sharing 92–93 % 16S rRNA gene sequence similarity with representatives of these genera. It is proposed, from the results of the polyphasic taxonomic analysis, that the strain should be placed in a new genus, Eudoraea gen. nov., with Eudoraea adriatica sp. nov. as the type species. The type strain is AS06/20aT (=DSM 19308T=CIP 109577T=OOB 358T).

Abbreviations: ASW, artificial seawater; DOM, dissolved organic material; HMM, high molecular mass

{dagger}Present address: UMR6197, Laboratoire de Microbiologie des Environnements Extrêmes, IUEM, Technopôle Brest-Iroise, F-29280 Plouzané, France.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Eudoraea adriatica AS06/20aT is AM745437.

A scanning electron micrograph of cells of strain AS06/20aT and graphs showing the effects of temperature, pH and salinity on the maximum growth rate of the novel isolate are available as supplementary material with the online version of this paper.






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