eCite Digital Repository

Psychroflexus torquis gen. nov., sp. nov., a psychrophilic species from Antarctic sea ice, and reclassification of Flavobacterium gondwanense (Dobson et al. 1993) as Psychroflexus gondwanense gen. nov., comb. nov

Citation

Bowman, JP and McCammon, SA and Lewis, TE and Skerratt, J and Brown, JL and Nichols, DS and McMeekin, TA, Psychroflexus torquis gen. nov., sp. nov., a psychrophilic species from Antarctic sea ice, and reclassification of Flavobacterium gondwanense (Dobson et al. 1993) as Psychroflexus gondwanense gen. nov., comb. nov, Microbiology, 144, (6) pp. 1601-1609. ISSN 1350-0872 (1998) [Refereed Article]

DOI: doi:10.1099/00221287-144-6-1601

Abstract

A group of sea-ice-derived psychrophilic bacterial strains possessing the unusual ability to synthesize the polyunsaturated fatty acids eicosapentaenoic acid (20:5ω3) and arachidonic acid (20:4ω6) belong to the Family Flavobacteriaceae (Flexibacter-Bacteroides-Flavobacterium phylum), according to 16S rRNA sequence analysis. Surprisingly, the isolates were also found to cluster closely to the moderately halophilic and psychrotrophic species [Flavobacterium] gondwanense (sequence similarity 97.8-98.1%). The whole-cell fatty acid profiles of this group and [Flavobacterium] gondwanense were very similar and distinct from other related flavobacteria. The sea ice strains and [Flavobacterium] gondwanense differed substantially in terms of ecophysiology, possibly representing divergent adaptations to sympagic and planktonic marine habitats, respectively. Evidence based on phylogeny and fatty acid profiles supports the conclusion that the taxa are close relatives distinct from other bacterial groups. It is thus proposed that the sea ice strains represent a novel taxon designated Psychroflexus torquis gen. nov., sp. nov. (type strain ACAM 623(T) while [Flavobacterium] gondwanense becomes Psychroflexus gondwanense gen. nov., comb. nov.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Bacteriology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Bowman, JP (Associate Professor John Bowman)
Author:McCammon, SA (Ms Sharee McCammon)
Author:Lewis, TE (Dr Thomas Lewis)
Author:Skerratt, J (Dr Jenny Skerratt)
Author:Brown, JL (Dr Janelle Brown)
Author:Nichols, DS (Dr David Nichols)
Author:McMeekin, TA (Professor Thomas McMeekin)
ID Code:13304
Year Published:1998
Web of Science® Times Cited:137
Deposited By:Agricultural Science
Deposited On:1998-08-01
Last Modified:2011-08-08
Downloads:0

Repository Staff Only: item control page