Tor J M, Kashefi K, Lovley D R
Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Appl Environ Microbiol. 2001 Mar;67(3):1363-5. doi: 10.1128/AEM.67.3.1363-1365.2001.
No hyperthermophilic microorganisms have previously been shown to anaerobically oxidize acetate, the key extracellular intermediate in the anaerobic oxidation of organic matter. Here we report that two hyperthermophiles, Ferroglobus placidus and "Geoglobus ahangari," grow at 85 degrees C by oxidizing acetate to carbon dioxide, with Fe(III) serving as the electron acceptor. These results demonstrate that acetate could potentially be metabolized within the hot microbial ecosystems in which hyperthermophiles predominate, rather than diffusing to cooler environments prior to degradation as has been previously proposed.
此前尚未发现有嗜热微生物能够厌氧氧化乙酸盐,而乙酸盐是厌氧氧化有机物过程中的关键胞外中间体。在此我们报告,两种嗜热菌,即扁平铁球古菌和“阿氏地球形菌”,在85摄氏度下通过将乙酸盐氧化为二氧化碳来生长,以Fe(III)作为电子受体。这些结果表明,乙酸盐有可能在以嗜热菌为主的高温微生物生态系统中被代谢,而不是像之前所提出的那样在降解之前扩散到较冷的环境中。