Inactivation of Photosystem II and Turnover of the D1-Protein by Light and Heat Stresses

  • Gadi Schuster
  • Susana Shochat
  • Noam Adir
  • Itzhak Ohad
Part of the NATO ASI Series book series (NSSA, volume 168)


The photosynthetic electron flow activity is sensitive to physiological stress conditions such as light, heat, cold or water stress1,2. Interestingly, photosystem I (PS I) is not as sensitive as photosystem II (PS II), and in most cases, PS I continues to operate normally under conditions in which PS II activity is completely inhibited. As plants are exposed to stress conditions in their natural habitats, the questions arise as to what are the molecular mechanisms of the stress induced inactivation of PS II and whether there are physiological processes in the chloroplasts which may protect the photosynthetic electron flow activity of PS II from the specific damage induced by environmental stresses. Among these, the inactivation of PS II by light and heat stress have been extensively studied using the green alga Chlamydomonas reinhardtii.


Heat Stress Specific Damage Heat Shock Condition Chlamydomonas Cell Photosynthetic Electron Flow 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Gadi Schuster
    • 1
  • Susana Shochat
    • 1
  • Noam Adir
    • 1
  • Itzhak Ohad
    • 1
  1. 1.Dept. of Biological ChemistryThe Hebrew University of JerusalemJerusalemIsrael

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