AEROBIC SULFATE REDUCTION IN MICROBIAL MATS
AEROBIC SULFATE REDUCTION IN MICROBIAL MATS
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DOI：
10.1126/science.11538266
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发表时间：
1991-03-22
期刊：
影响因子：
56.9
通讯作者：
DESMARAIS, DJ
中科院分区：
文献类型：
--
作者：
CANFIELD, DE;DESMARAIS, DJ
对来自墨西哥下加利福尼亚的高盐细菌垫中的细菌硫酸盐还原和溶解氧（O2）的测量表明，硫酸盐还原始终发生在垫的充分氧化的光合区内。 这一证据表明，异化硫酸盐还原可以发生在O2的存在下，挑战传统的观点，硫酸盐还原是一个严格的厌氧过程。 在恒定的温度下，在白天的氧化垫中的硫酸盐还原速率与在夜间的缺氧垫中的速率相似：因此，在24小时的循环期间，光和O2的变化对这些垫中的硫酸盐还原速率几乎没有影响。
Measurements of bacterial sulfate reduction and dissolved oxygen (O2) in hypersaline bacterial mats from Baja California, Mexico, revealed that sulfate reduction occurred consistently within the well-oxygenated photosynthetic zone of the mats. This evidence that dissimilatory sulfate reduction can occur in the presence of O2 challenges the conventional view that sulfate reduction is a strictly anaerobic process. At constant temperature, the rates of sulfate reduction in oxygenated mats during daytime were similar to rates in anoxic mats at night: thus, during a 24-hour cycle, variations in light and O2 have little effect on rates of sulfate reduction in these mats.