- International Journal of Systematic and Evolutionary Microbiology
- Volume 48, Issue 4
f Antarctobacter heliothermus gen. nov., sp. nov., a budding bacterium from hypersaline and heliothermal Ekho Lake
- Authors: MATTHIAS LABRENZ, M. DAVID COLLINS, PAUL A. LAWSON, BRIAN J. TINDALL, GESCHE BRAKER, PETER HIRSCH4
- 4Tel: +49 431 880 4340. Fax: +49 431 880 2194. e-mail: firstname.lastname@example.org
- Int J Syst Evol Microbiol, October 1998 48: 1363-1372, doi: 10.1099/00207713-48-4-1363
- Subject: Systematic Bacteriology
- Published Online:
Four Gram-negative, aerobic, pointed and budding bacteria were isolated from various depths of the hypersaline, heliothermal and meromictic Ekho Lake (Vestfold Hills, East Antarctica). The cells contained storage granules and formed rosettes. Daughter cells may be motile. Growth required sodium ions. Nitrate was reduced to nitrite, and dissimilatory reduction of nitrite was possible. DNase and gelatinase were produced. Glutamate was metabolized with and without an additional source of combined nitrogen. The most abundant fatty acid was C18:1; other fatty acids present in lower concentrations were C12:1 3-OH, C16:1, C16:0, C18:0 and C19:0 cyc. The main polar lipids were phosphatidylglycerol and phosphatidylcholine. The DNA base composition was 62·3–62·8 mol% G+C. 16S rDNA sequence comparisons showed the isolates to be phylogenetically related to the genera Sagittula and Roseobacter. Morphological, physiological and genotypic differences to these and distinct characteristics supported the description of a new genus and a new species, Antarctobacter heliothermus gen. nov., sp. nov. The type strain is EL-219T(= DSM 11445T).
Copyright © 1998 International Union of Microbiological Societies | Published by the Microbiology Society
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