Journal
PHOTOSYNTHESIS RESEARCH
Volume 107, Issue 1, Pages 87-101Publisher
SPRINGER
DOI: 10.1007/s11120-010-9577-1
Keywords
Archean; Carbon isotopes; Confocal laser scanning microcopy; Great oxidation event; Microfossils; Precambrian; Raman spectroscopy
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Funding
- CSEOL, the IGPP Center for the Study of Evolution and the Origin of Life at UCLA
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Fossil evidence of photosynthesis, documented in Precambrian sediments by microbially laminated stromatolites, cyanobacterial microscopic fossils, and carbon isotopic data consistent with the presence of Rubisco-mediated CO2-fixation, extends from the present to similar to 3,500 million years ago. Such data, however, do not resolve time of origin of O-2-producing photoautotrophy from its anoxygenic, bacterial, evolutionary precursor. Though it is well established that Earth's ecosystem has been based on autotrophy since its very early stages, the time of origin of oxygenic photosynthesis, more than 2,450 million years ago, has yet to be established.
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