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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >An obligately photosynthetic bacterial anaerobe from a deep-sea hydrothermal vent
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An obligately photosynthetic bacterial anaerobe from a deep-sea hydrothermal vent

机译：来自深海热液喷口的专性光合细菌厌氧菌

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摘要

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.
机译：地球上丰富的生命几乎完全归因于生物光合作用，而光合作用又取决于光能。迄今为止，人们一直认为自然栖息地中的光源是太阳，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射的环境中进行，它将增加地球和其他已提出可能掩盖生命的世界上光合作用栖息地的多样性。绿色硫细菌是厌氧菌，需要光才能通过硫化合物的氧化将二氧化碳还原为有机碳，从而生长，并且能够在极低的光强度下进行光合生长。我们描述了从深海热液喷口中分离和培养以前未知的绿色硫细菌物种的方法，其中唯一的光源是地热辐射，其中包括该生物的光合色素吸收的波长。

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