Regulation of Proton Diffusion Pathways in Chloroplast Thylakoids by Ca++ Gating

  • Richard A. Dilley
  • Gisela G. Chiang
Part of the NATO ASI Series book series (NSSA, volume 7)


This chapter will present background information and some of the experiments which led to the hypothesis, and various tests of it, concerning a Ca++ controlled gate for regulating H+ ion diffusion pathways between localized and delocalized energy coupling gradients in thylakoid membranes. The arguments about whether photophosphorylation could be energized by localized proton gradients or only by delocalized gradients were unresolved for some time and had proponents on each side (i.e., see Ferguson (1985) for thorough review of the question as of 1985). The issue is clearer now, in light of recent results (see Dilley et al. (1987) for a review), and our present view is that both types of energy coupling proton gradients occur in thylakoids.


Storage Medium Proton Gradient Energy Coupling Intact Chloroplast Flash Sequence 
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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Richard A. Dilley
    • 1
  • Gisela G. Chiang
    • 1
  1. 1.Department of Biological SciencesPurdue UniversityWest LafayetteUSA

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