Redox Tuning in Photosystem II

Trends Plant Sci. 2017 Feb;22(2):97-99. doi: 10.1016/j.tplants.2016.11.011. Epub 2016 Dec 13.


In photosynthesis, oxygen is liberated from water, not from CO2; however, this model has been silent on why photosynthesis requires bicarbonate. Rutherford and colleagues solve this problem elegantly: bicarbonate tunes water-oxidising photosystem II to make onward electron transfer efficient; an absence of bicarbonate retunes, redirects, and safely shuts down energy flow.

Publication types

  • Review
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electron Transport / genetics
  • Electron Transport / physiology
  • Oxidation-Reduction
  • Photosynthesis / genetics
  • Photosynthesis / physiology
  • Photosystem II Protein Complex / metabolism*
  • Water / metabolism


  • Photosystem II Protein Complex
  • Water