A new sulfur-reducing, extremely thermophilic eubacterium from a submarine thermal vent.

摘要: A newly described bacterial isolate, designated strain NS-E, differs from presently known extremely thermophilic bacteria in various characteristics. It is a strictly heterotrophic eubacterium of marine origin and has temperature range for growth 50 to 95 degrees C with an optimum at 77 pH 7.5. Its DNA base composition 41.3 mol% guanine + cytosine. obligately anaerobic, utilizes sugars as well yeast extract, reduces elemental sulfur facultatively hydrogen sulfide. In 24-h cultures cell densities are up fourfold higher the presence than absence sulfur. Sulfide concentrations 1.0 10.0 mM limit by 65 95%, respectively. Oxygen sensitivity apparent only or above that which occurs.