English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Six strains of thermophilic, endospore-forming, sulfate-reducing bacteria were enriched and isolated from 2.7 km below the earth's surface in the Taylorsville Triassic Basin in Virginia. The cells of these strains were motile rods that were 1 to 1.1 pm in diameter and 2 to 5 pm long. The cells grew by oxidizing H,, formate, methanol (weakly), lactate (incompletely, to acetate and CO,), or pyruvate (incompletely) while reducing sulfate to sulfide; acetate did not serve as a catabolic substrate. Thiosulfate or sulfite could replace sulfate as an electron acceptor. The results of a phylogenetic analysis of the 16s rRNA gene indicated that these strains belong to the genus Desulfotomaculum, but are distinct from previously described Desulfotomaculum species. Thus, we propose a new species, Desulfotomaculum putei, for them, with strain TH-11 (= SMCC W459) as the type strain. The results of our phylogenetic analysis also indicated that strain SLTT, which was isolated from a hot spring and has been described previously (T. M. Karnauchow, S. F. Koval, and K. F. Jarrell, Syst. Appl. Microbiol. 15296-310, 1992), is also a member of the genus Desulfotomaculum and is distinct from other species in this genus. We therefore propose the new species Desulfotomaculum Zuciue for this organism; strain SLT (= SMCC W644) is the type strain of D. luciae. Moderately thermophilic sulfate-reducing bacteria are found in a wide range of anaerobic environments, including geother- mal regions. The extremely thermophilic sulfate reducers are members of the Archaea; however, the moderately thermo- philic sulfate reducers are true bacteria, and all of these bac- teria fall in the genera Desulfotomaculum, Thermodesulfobac- terium, and Thermodesulfovibrio (19, 20, 36). The genera Thermodcsulfohacterium and Thermodesulfovibrio are genera that contain non-endospore-forming, thermophilic, sulfate-re- ducing rods. The genus Desulfotomaculum contains endo- spore-forming sulfate-reducing bacteria, including seven ther- mophilic species isolated from thermal groundwater and springs and from anaerobic digestors (Table 1). An important role of Desulfotomaculum species in these environments is the oxidation of organic compounds with concomitant reduction of sulfate and other sulfur oxyanions to sulfide. We describe here two new sulfate-reducing Desulfotomacu- lum species, including a strain isolated from a geothermal spring (23) and a group of new isolates obtained from a deep terrestrial subsurface environment (6). (Some of the results of this work have been presented pre- viously (5).)

international journal of systematic and evolutionary microbiology

Description of Two New Thermophilic Desulfotomaculum spp., Desulfotomaculum putei sp. nov., from a Deep Terrestrial Subsurface, and Desulfotomaculum luciae sp. nov., from a Hot Spring