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Abstract

A Gram-negative, non-spore-forming, short rod-shaped bacterium (UST010723-006) was isolated from the surface of the sponge in Hong Kong waters. Cells of UST010723-006 did not have flagella and were non-motile. Colonies were pale orange in colour, 2–4 mm in diameter, convex with a smooth surface and an entire translucent margin. Gas bubbles were observed in the colonies and also in the agar matrix underneath and adjacent to the colonies. UST010723-006 was heterotrophic, strictly aerobic and required NaCl for growth (2·0–6·0 %). It grew at pH 5·0–10·0 and between 12 and 44 °C. Phylogenetic analysis of the 16S rRNA gene sequence placed UST010723-006 within the genus of the -subclass of the . The DNA G+C content is 40·6 mol% and the dominant fatty acids were 12 : 0 3-OH, 14 : 0, 15 : 0 iso 2-OH, 16 : 0, 16 : 17, 17 : 18 and 18 : 17 (altogether representing 75·9 % of the total).These data supported the affiliation of UST010723-006 to the genus . The closest relatives were , , and with similarity values ranging from 95·4 to 96·8 %. UST010723-006 differed from these closest relatives by 9–19 traits. Molecular evidence, together with phenotypic characteristics, suggests that UST010723-006 constitutes a novel species within the genus . The name sp. nov. is proposed for this bacterium. The type strain is UST010723-006 (=NRRL B-41100=JCM 12884).

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2005-07-01
2019-09-16
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