Pseudoalteromonas spongiae sp. nov., a novel member of the γ-proteobacteria isolated from the sponge Mycale adhaerens in Hong Kong waters

Stanley C.K. Lau, Mandy M.Y. Tsoi, Xiancui Li, Sergey Dobretsov, Yulia Plakhotnikova, Po Keung Wong, Pei Yuan Qian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


A Gram-negative, non-spore-forming, short rod-shaped bacterium (UST010723-006T) was isolated from the surface of the sponge Mycale adhaerens in Hong Kong waters. Cells of UST010723-006T 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. UST010723-006T 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 UST010723-006T within the genus Pseudoalteromonas of the γ-subclass of the Proteobacteria. 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, 16:1ω7, 17:1ω8 and 18:1ω7 (altogether representing 75.9% of the total). These data supported the affiliation of UST010723-006T to the genus Pseudoalteromonas. The closest relatives were Pseudoalteromonas luteviolacea, P. phenolica, P. rubra and P. ruthenica with similarity values ranging from 95.4 to 96.8%. UST010723-006T differed from these closest relatives by 9-19 traits. Molecular evidence, together with phenotypic characteristics, suggests that UST010723-006T constitutes a novel species within the genus Pseudoalteromonas. The name Pseudoalteromonas spongiae sp. nov. is proposed for this bacterium. The type strain is UST010723-006T (=NRRL B-41100T=JCM 12884T).

Original languageEnglish
Pages (from-to)1593-1596
Number of pages4
JournalInternational Journal of Systematic and Evolutionary Microbiology
Issue number4
Publication statusPublished - Jul 2005
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics


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