publication . Other literature type . Article . 2008

When did oxygenic photosynthesis evolve?

Roger Buick;
Open Access English
  • Published: 09 May 2008
  • Publisher: The Royal Society
The atmosphere has apparently been oxygenated since the ‘Great Oxidation Event’ ca 2.4 Ga ago, but when the photosynthetic oxygen production began is debatable. However, geological and geochemical evidence from older sedimentary rocks indicates that oxygenic photosynthesis evolved well before this oxygenation event. Fluid-inclusion oils in ca 2.45 Ga sandstones contain hydrocarbon biomarkers evidently sourced from similarly ancient kerogen, preserved without subsequent contamination, and derived from organisms producing and requiring molecular oxygen. Mo and Re abundances and sulphur isotope systematics of slightly older (2.5 Ga) kerogenous shales record a trans...
free text keywords: Research Article, General Biochemistry, Genetics and Molecular Biology, General Agricultural and Biological Sciences, Biology, Plankton, Ecology, Kerogen, chemistry.chemical_compound, chemistry, Oxygen evolution, Oxygen, chemistry.chemical_element, Photosynthesis, Geologic record, Cyanobacteria, biology.organism_classification, Great Oxygenation Event
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