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Formation of thionates by freshwater and marine strains of sulfate-reducing bacteria

Sass, Henrik ORCID:, Steuber, J., Kroder, M., Kroneck, P. M. H. and Cypionka, Heribert 1992. Formation of thionates by freshwater and marine strains of sulfate-reducing bacteria. Archives of Microbiology 158 (6) , pp. 418-421. 10.1007/BF00276302

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The formation of thionates (thiosulfate, trithionate and tetrahionate) during the reduction of sulfate or sulfite was studied with four marine and four freshwater strains of sulfate-reducing bacteria. Growing cultures of two strains of the freshwater species Desulfovibrio desulfuricans formed up to 400 mgrM thiosulfate and 100 mgrM trithionate under conditions of electron donor limitation. Tetrathionate was observed in lower concentrations of up to 30 mgrM. Uncoupler-treated washed cells of the four freshwater strains formed thiosulfate and trithionate at low electron donor concentrations with sulfite in excess. In contrast, only one of four marine strains formed thionates. The freshwater strain Desulfobulbus propionicus transformed sulfite almost completely to thiosulfate and trithionate. The amounts produced increased with time, concentration of added sulfite and cell density. Tetrathionate was detected only occasionally and in low concentrations, and was probably formed by chemical oxidation of thiosulfate. The results confirm the diversity of the sulfite reduction pathways in sulfate-reducing bacteria, and suggest that thiosulfate and trithionate are normal by-products of sulfate reduction.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Environmental Sciences
Subjects: Q Science > QR Microbiology
Uncontrolled Keywords: Dissimilatory sulfate reduction; Sulfite; Thiosulfate; Trithionate; Desulfovibrio desulfuricans; Desulfobulbus propionicus
Publisher: Springer
ISSN: 0302-8933
Last Modified: 18 Oct 2022 12:19

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