Abstract
Fourteen strains of a thermophilic, rod-shaped, peritrichously flagellatedClostridium species were isolated from various mud and soil samples. Round to slightly oval spores were formed in terminal position. The isolates were obligate anaerobes and grew chemolithotrophically with H2 plus CO2 as well as chemoorganotrophically with fructose, glucose, glycerate, or methanol. Under both conditions, acetate was the only organic fermentation product formed in significant amounts. The pH optimum for growth was 5.7; the marginal temperatures for growth wereT min, 36°C;T opt, 56–60°C; andT max, 69/70°C. The DNA contained 53–55 mol% guanine plus cytosine. the isolated strains form a new clostridial species; the nameClostridium thermoautotrophicum is proposed.
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Wiegel, J., Braun, M. & Gottschalk, G. Clostridium thermoautotrophicum species novum, a thermophile producing acetate from molecular hydrogen and carbon dioxide. Current Microbiology 5, 255–260 (1981). https://doi.org/10.1007/BF01571158
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DOI: https://doi.org/10.1007/BF01571158