An obligately photosynthetic bacterial anaerobe from a deep-sea hydrothermal vent
An obligately photosynthetic bacterial anaerobe from a deep-sea hydrothermal vent
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DOI：
10.1073/pnas.0503674102
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发表时间：
2005-06-28
影响因子：
11.1
通讯作者：
Plumley, FG
中科院分区：
文献类型：
--
作者：
Beatty, JT;Overmann, J;Plumley, FG
地球上生命的丰富性几乎完全归功于生物的光合作用，而光合作用依赖于光能。迄今为止，自然栖息地的光源一直被认为是太阳，因此将光合作用限制在地球表面的太阳光环境中。如果光合作用可以在地热照明的环境中进行，它将增加地球上和其他可能存在生命的世界上光合作用栖息地的多样性。绿硫细菌是厌氧菌，需要光才能生长，通过氧化硫化合物将二氧化碳还原为有机碳，并且能够在极低的光强度下进行光合作用生长。我们描述了从深海热液喷口分离和培养一种以前未知的绿色硫细菌物种，其中唯一的光源是地热辐射，其中包括该生物体光合色素吸收的波长。
The abundance of life on Earth is almost entirely due to biological photosynthesis, which depends on light energy. The source of light in natural habitats has heretofore been thought to be the sun, thus restricting photosynthesis to solar photic environments on the surface of the Earth. If photosynthesis could take place in geothermally illuminated environments, it would increase the diversity of photosynthetic habitats both on Earth and on other worlds that have been proposed to possibly harbor life. Green sulfur bacteria are anaerobes that require light for growth by the oxidation of sulfur compounds to reduce CO2 to organic carbon, and are capable of photosynthetic growth at extremely low light intensities. We describe the isolation and cultivation of a previously unknown green sulfur bacterial species from a deep-sea hydrothermal vent, where the only source of light is geothermal radiation that includes wavelengths absorbed by photosynthetic pigments of this organism.