Photosynthesis and the Origin of Life
@article{Hartman2004PhotosynthesisAT, title={Photosynthesis and the Origin of Life}, author={Hyman Hartman}, journal={Origins of life and evolution of the biosphere}, year={2004}, volume={28}, pages={515-521} }
The origin and evolution of photosynthesis is considered to be the key to the origin of life. This eliminates the need for a soup as the synthesis of the bioorganics are to come from the fixation of carbon dioxide and nitrogen. No soup then no RNA world or Protein world. Cyanobacteria have been formed by the horizontal transfer of green sulfur bacterial photoreaction center genes by means of a plasmid into a purple photosynthetic bacterium. The fixation of carbon dioxide is considered to have…
66 Citations
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Oxygenic photosynthesis, i.e. the biosynthesis of carbohydrate from CO2 supported by light-dependent ATP formation and production of O2, evolved very early, presumably about 2,300 million years…
Thinking About the Evolution of Photosynthesis
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The transition from anoxygenic to oxygenic photosynthesis took place when the cyanobacteria learned how to use water as an electron donor for carbon dioxide reduction, and before that, ferrous iron may have been the original source of reducing power.
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- BiologyProceedings of the National Academy of Sciences
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Significance Photosynthesis supports life on our planet; however, we know very little about the origins of this metabolism. Anoxygenic photosynthesis existed prior to the evolution of its more…
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The original conviction that the evolution of photosynthesis was intimately connected with the origin of life has been replaced with the realization that photosynthesis may have been invented by the Bacteria after their divergence from the Archea.
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This chapter focuses on the driving forces of the origin and the evolution of the early anoxygenic photosynthesis before the onset of the oxygenic cyanobacterial photosynthesis 2.8–2.4 billion years…
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It is shown that the emergence of the present mechanistic concepts was closely linked to the changing perception of the process of photosynthetic water oxidation, and can be fueled by reducing equivalents derived from a photolysis of water as well as by an oxidation of internal and external organic molecules.
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The possible origins of photosynthesis in relation to hypotheses on the origin of life is discussed and it is proposed that the first organization of preprotoplasm would be a primitive energy-conversion unit that could perform the elementary processes of photoynthesis and respiration.
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