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ISOLATION AND CHARACTERIZATION OF THIOBACILLUS-HALOPHILUS SP-NOV, A SULFUR-OXIDIZING AUTOTROPHIC EUBACTERIUM FROM A WESTERN AUSTRALIAN HYPERSALINE LAKE

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UNSPECIFIED (1991) ISOLATION AND CHARACTERIZATION OF THIOBACILLUS-HALOPHILUS SP-NOV, A SULFUR-OXIDIZING AUTOTROPHIC EUBACTERIUM FROM A WESTERN AUSTRALIAN HYPERSALINE LAKE. ARCHIVES OF MICROBIOLOGY, 156 (4). pp. 277-280.

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Abstract

The isolation of a novel obligately chemolithotrophic, halophilic and extremely halotolerant Thiobacillus from a hypersaline lake is described. Attempts to demonstrate sulphur- and ferrous iron-oxidizing chemolithotrophs in neighbouring hypersaline lakes were unsuccessful. The organism isolated differs from any other Thiobacillus species previously described and is formally named as Thiobacillus halophilus. It possesses ribulose bisphosphate carboxylase and grows chemolithoautotrophically on thiosulphate, tetrathionate and sulphur, oxidising them to sulphate. Kinetic constants for oxidation of sulphide, thiosulphate, trithionate and tetrathionate are presented. The organism is obligately halophilic, growing best with 0.8-1.0 M NaCl, and tolerating up to 4 M NaCl. Optimum growth was obtained at about 30-degrees-C and pH 7.0-7.3. It contains ubiquinone Q-8 and its DNA contains 45 mol % G + C. Organisms of this type might contribute significantly to the autotrophic fixation of carbon dioxide in some hypersaline extreme environments of the kind described.

Item Type: Journal Article
Subjects: Q Science > QR Microbiology
Journal or Publication Title: ARCHIVES OF MICROBIOLOGY
Publisher: SPRINGER VERLAG
ISSN: 0302-8933
Official Date: September 1991
Dates:
DateEvent
September 1991UNSPECIFIED
Volume: 156
Number: 4
Number of Pages: 4
Page Range: pp. 277-280
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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