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Fractionation of sulfur isotopes during dissimilatory reduction of sulfate by a thermophilic gram-negative bacterium at 60 °C (1999)

Böttcher, M. E. ; Sievert, S. M. ; Kuever, Jan

Springer

Archives of microbiology 172 (1999), S. 125-128

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ISSN: 1432-072X

Keywords: Key words Thermophilic sulfate-reducing bacteria ; Sulfate reduction ; Gram-negative bacteria ; Stable sulfur isotope fractionation ; High temperature ; Complete ; oxidizer

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Sulfur isotope (34S/32S) fractionation during reduction of dissolved sulfate was investigated with a growing batch culture of a thermophilic, gram-negative, sulfate-reducing bacterium (strain MT-96) at 60 °C. The completely oxidizing strain was isolated from geothermally heated sediments of a shallow-water hydrothermal vent in the Mediterranean Sea. The hydrogen sulfide produced in the experiments was enriched in 32S by approximately 19‰ as compared to sulfate, which indicates that stable isotope discrimination by this thermophile is within the range found previously for mesophilic sulfate-reducing bacteria, and only slightly higher than that observed for the thermophilic gram-positive Desulfotomaculum nigrificans.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s002030050749

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