Summary #690

Strange bacteria hint at ancient origin of photosynthesis

imperial.ac.uk
  • Discovery of water-splitting structures inside the H. modesticaldum bacteria might be proof that current theories about the origin of photosynthesis are wrong.
  • Oxygenic photosynthesis is believed to have come from the evolution of cyanobacteria, but H. modesticaldum is much more ancient.
  • This could suggest that oxygenic photosynthesis evolved even before anoxygenic photosynthesis.
  • Current theory might wrongly assume the anoxygenic process (performed by H. modesticaldum) to be a first step in oxygenic's evolution.
  • The conclusions come from finding similarities in structures used by H. modesticaldum and modern cyanobacteria to perform their types of photosynthesis.

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