期刊
GEOBIOLOGY
卷 15, 期 1, 页码 19-29出版社
WILEY
DOI: 10.1111/gbi.12200
关键词
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资金
- Gordon and Betty Moore Foundation [GBMF 2550.04]
- Joint BioEnergy Institute
- U.S. Department of Energy. Office of Science, Office of Biological and Environmental Research [DE-AC02-05CH11231]
- National Institute for Mathematical and Biological Synthesis
- National Science Foundation
- U.S. Department of Homeland Security
- U.S. Department of Agriculture through NSF [EF-0832858, DBI-1300426]
- University of Tennessee, Knoxville
- Agouron Institute and Caltech Center for Environment Microbe Interactions
- NSF
- NASA [NNX16AJ57G]
- Agouron Institute
- David and Lucile Packard Foundation
- Direct For Biological Sciences [1300426] Funding Source: National Science Foundation
The rise of oxygen ca. 2.3 billion years ago (Ga) is the most distinct environmental transition in Earth history. This event was enabled by the evolution of oxygenic photosynthesis in the ancestors of Cyanobacteria. However, long-standing questions concern the evolutionary timing of this metabolism, with conflicting answers spanning more than one billion years. Recently, knowledge of the Cyanobacteria phylum has expanded with the discovery of non-photosynthetic members, including a closely related sister group termed Melainabacteria, with the known oxygenic phototrophs restricted to a clade recently designated Oxyphotobacteria. By integrating genomic data from the Melainabacteria, cross-calibrated Bayesian relaxed molecular clock analyses show that crown group Oxyphotobacteria evolved ca. 2.0 billion years ago (Ga), well after the rise of atmospheric dioxygen. We further estimate the divergence between Oxyphotobacteria and Melainabacteria ca. 2.5-2.6 Ga, which-if oxygenic photosynthesis is an evolutionary synapomorphy of the Oxyphotobacteria-marks an upper limit for the origin of oxygenic photosynthesis. Together, these results are consistent with the hypothesis that oxygenic photosynthesis evolved relatively close in time to the rise of oxygen.
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