BACTERIAL SULFATE REDUCTION ABOVE 100-DEGREES-C IN DEEP-SEA HYDROTHERMAL VENT SEDIMENTS
BACTERIAL SULFATE REDUCTION ABOVE 100-DEGREES-C IN DEEP-SEA HYDROTHERMAL VENT SEDIMENTS
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DOI：
10.1126/science.258.5089.1756
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发表时间：
1992-12-11
期刊：
影响因子：
56.9
通讯作者：
JANNASCH, HW
中科院分区：
文献类型：
--
作者：
JORGENSEN, BB;ISAKSEN, MF;JANNASCH, HW
目前已知的生物体生长的温度上限是110摄氏度，这是许多古细菌所共有的。然而，在硫酸盐还原菌中，还没有发现100 ℃以上的生长温度。在加州湾的瓜伊马斯盆地构造扩张中心的热液喷口的深海热液沉积物中，进行了硫酸盐还原菌高温活性的研究。放射性示踪剂研究表明，硫酸盐还原可以在高达110摄氏度的温度下发生，最佳速率在103摄氏度至106摄氏度之间。这一观察结果将深海沉积物中这一过程的温度上限扩大了20摄氏度，并表明存在一组未知的超嗜热细菌，它们对100摄氏度以上硫的生物地球化学具有潜在的重要性。
The currently known upper temperature limit for growth of organisms, shared by a number of archaebacteria, is 110-degrees-C. However, among the sulfate-reducing bacteria, growth temperatures of greater than 100-degrees-C have not been found. A search for high-temperature activity of sulfate-reducing bacteria was done in hot deep-sea sediments at the hydrothermal vents of the Guaymas Basin tectonic spreading center in the Gulf of California. Radiotracer studies revealed that sulfate reduction can occur at temperatures up to 110-degrees-C, with an optimum rate at 103-degrees to 106-degrees-C. This observation expands the upper temperature limit of this process in deep-ocean sediments by 20-degrees-C and indicates the existence of an unknown groUp of hyperthermophilic bacteria with a potential importance for the biogeochemistry of sulfur above 100-degrees-C.