Abstract
An extremely thermophilic, obligately anaerobic, sulphur-metabolizing archaebacterium of the order Thermococcales, previously isolated from a thermal pool at Kuirau Park, Rotorua, New Zealand, partially described, and designated isolate ANI, Thermococcales was further characteized. The isolate was a regular coccus of 0.5–2.0 mm in diameter, was strictly anaerobic, chemoorganotrophic, and fermentative. Peptone, yeast extract, or casein served as carbon and nitrogen source, and a variety of amino acids and glucose, but not organic acids, carbohydrates, or other sugars supported growth in the presence of peptone (0.1%). Major metabolic end products were H2, sulphide, acetate, isobutyrate, and isovalerate/2-methylbutyrate. Isolate ANI had a temperature optimum of 75–80°C, a pH optimum of 7.4, and a sodium chloride concentration optimum of 50mM. No growth was observed in the absence of sodium chloride (or lithium chloride) and sulphur (or cystine or oxidized glutathione).
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Klages, K.U., Morgan, H.W. Characterization of an extremely thermophilic sulphur-metabolizing archaebacterium belonging to the Thermococcales. Arch. Microbiol. 162, 261–266 (1994). https://doi.org/10.1007/BF00301848
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DOI: https://doi.org/10.1007/BF00301848