湖生颤藻中的兼性无氧光合作用。
Facultative anoxygenic photosynthesis in the cyanobacterium Oscillatoria limnetica.
作者信息
Cohen Y, Padan E, Shilo M
出版信息
J Bacteriol. 1975 Sep;123(3):855-61. doi: 10.1128/jb.123.3.855-861.1975.
Abstract
An isolate from H2S-rich layers of the Solar Lake, the cyanobacterium Oscillatoria limnetica, exhibits both oxygenic and anoxygenic photosynthesis. It can use Na2S as an electron donor for CO2 photoassimilation (photosystem I supplies the energy) in the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea or 700-nm light. A stoichiometric ratio of approximately 2 is observed between the Na2S consumed and the photoassimilated CO2. The anoxygenic phototrophic capability of this cyanobacterium explains its growth in nature in high sulfide concentrations and indicates a selective advantage.
摘要
从太阳能湖富含硫化氢的水层中分离出的蓝藻Limnetica颤藻，同时具备产氧光合作用和不产氧光合作用。在存在3-(3,4-二氯苯基)-1,1-二甲基脲或700纳米光的情况下，它可以利用硫化钠作为电子供体进行二氧化碳的光同化作用（光系统I提供能量）。在消耗的硫化钠和光同化的二氧化碳之间观察到大约2的化学计量比。这种蓝藻的不产氧光养能力解释了它在自然界中在高硫化物浓度下的生长情况，并表明了一种选择优势。
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