Int J Syst Evol Microbiol 55 (2005), 757-762; DOI 10.1099/ijs.0.03030-0
© 2005 International Union of Microbiological Societies
Psychrobacter vallis sp. nov. and Psychrobacter aquaticus sp. nov., from Antarctica
Sisinthy Shivaji1,
Gundlapalli S. N. Reddy1,
Korpole Suresh1,
Pratima Gupta1,
Suresh Chintalapati1,
Peter Schumann2,
Erko Stackebrandt2 and
Genki I. Matsumoto3
1 Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
2 DSMZ Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany
3 Department of Environmental and Information Science, Otsuma Women's University, Tamashi, Tokyo 206, Japan
Correspondence
Sisinthy Shivaji
shivas{at}ccmb.res.in
Twelve strains of psychrophilic bacteria were isolated from cyanobacterial mat samples collected from various water bodies in the McMurdo Dry Valley region of Antarctica. All the isolates were Gram-negative, non-motile, coccoid, psychrophilic, halotolerant bacteria and had C16 : 1
7c, C17 : 1
8c and C18 : 1
9c as the major fatty acids, ubiquinone-8 as the respiratory quinone and DNA G+C content of 4146 mol%. Based on these characteristics, the isolates were assigned to the genus Psychrobacter. Based on their SDS-PAGE profiles, the 12 isolates could be categorized into three groups. Six isolates of Group I were identified as representing strains of Psychrobacter okhotskensis. However, using detailed phenotypic and chemotaxonomic characteristics and phylogenetic analysis based on their 16S rRNA gene sequences, strain CMS 39T, the only strain from Group II, and strain CMS 56T, a representative strain of Group III, were different from each other and from all recognized species of Psychrobacter. Therefore, it is proposed to classify CMS 39T (=DSM 15337T=MTCC 4208T) and CMS 56T (=DSM 15339T=MTCC 4386T) as representing the type strains of novel species of Psychrobacter, for which the names Psychrobacter vallis sp. nov. and Psychrobacter aquaticus sp. nov., respectively, are proposed.
Published online ahead of print on 8 October 2004 as DOI 10.1099/ijs.0.03030-0.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains CMS 39T and CMS 56T are AJ584832 and AJ584833, respectively.
Tables giving additional data relating to fatty acid profiles, phospholipids, 16S rRNA gene sequence similarity and DNADNA relatedness are available as supplementary material in IJSEM Online.
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Copyright © 2005 by the International Union of Microbiological Societies.