Regulation of Proton Diffusion Pathways in Chloroplast Thylakoids by Ca++ Gating
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.
KeywordsStorage Medium Proton Gradient Energy Coupling Intact Chloroplast Flash Sequence
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- Beard, W. A. and Dilley, R. A., 1987, Pros. in Photosyn. Res., III: 165.Google Scholar
- Chiang, G. and Dilley, R. A., 1988, Plant Physiol., submitted.Google Scholar
- Horner, R. and Moudrianakis, E. N., 1983, J. Biol. Chem., 258: 1 1643.Google Scholar
- Murakami, S. and Nobel, P. S., 1967, Plant Cell. Physiol., 8: 657.Google Scholar
- Nishida, K., Tamai, N., and Ryoyama, K., 1966, Plant Cell Physiol., 7: 415.Google Scholar
- Vinkler, C., Avron, M. and Boyer, P. D., 1980, J. Biol. Chem., 255: 2263.Google Scholar