Extremophiles

, Volume 15, Issue 1, pp 45–57

Characterization of Hymenobacter isolates from Victoria Upper Glacier, Antarctica reveals five new species and substantial non-vertical evolution within this genus

Original Paper

DOI: 10.1007/s00792-010-0336-1

Cite this article as:
Klassen, J.L. & Foght, J.M. Extremophiles (2011) 15: 45. doi:10.1007/s00792-010-0336-1

Abstract

We isolated several Hymenobacter-like strains from Victoria Upper Glacier, Antarctica, basal ice that diverged substantially from currently defined Hymenobacter species according to their 16S rRNA and gyrB gene phylogenies. All strains were psychrotolerant, heterotrophic aerobes which grew preferentially on low salt and low nutrient strength agar. Further phenotypic and chemotaxonomic characterization of these isolates supported their assignment as five novel species: H. algoricola sp. nov., H. antarcticus sp. nov., H. elongatus sp. nov., H. fastidiosus sp. nov., and H. glaciei sp. nov. Remarkable among these data was the prevalence of horizontal gene transfers and phenotypic variation, even between apparently closely related strains. These results suggest extensive non-vertical evolution within the genus Hymenobacter, and may reflect evolutionary trajectories resulting from dormancy, e.g., during interment in glacial ice.

Keywords

Systematics Taxonomy Psychrophiles Psychrophile ecology Psychrophile physiology 

Supplementary material

792_2010_336_MOESM1_ESM.doc (262 kb)
Supplementary material 1 (DOC 262 kb)

Copyright information

© Springer 2010

Authors and Affiliations

  1. 1.Department of Biological SciencesUniversity of AlbertaEdmontonCanada

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