Beyond the Calvin cycle: autotrophic carbon fixation in the ocean.

来自 Semantic Scholar

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阅读量：

620

作者：

M Hügler，SM Sievert

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摘要：

Organisms capable of autotrophic metabolism assimilate inorganic carbon into organic carbon. They form an integral part of ecosystems by making an otherwise unavailable form of carbon available to other organisms, a central component of the global carbon cycle. For many years, the doctrine prevailed that the Calvin-Benson-Bassham (CBB) cycle is the only biochemical autotrophic CO2 fixation pathway of significance in the ocean. However, ecological, biochemical, and genomic studies carried out over the last decade have not only elucidated new pathways but also shown that autotrophic carbon fixation via pathways other than the CBB cycle can be significant. This has ramifications for our understanding of the carbon cycle and energy flow in the ocean. Here, we review the recent discoveries in the field of autotrophic carbon fixation, including the biochemistry and evolution of the different pathways, as well as their ecological relevance in various oceanic ecosystems.

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关键词：

reductive TCA cycle hydrothermal vents oxygen deficiency zones mesopelagic bathypelagic subseafloor marine microbiology

DOI：

10.1146/annurev-marine-120709-142712

被引量：

426

年份：

2010