Electron Transfer within Reaction-Centre Complexes
The electron is a negatively charged particle and migrates according to the local electrostatic potential, being more likely to move so as to occupy an orbital of the same or a neighbouring molecule with a lower energy, that is, with a more positive potential. In so doing, the electrical work done appears as heat. The greater the heat released at any stage, the less reversible the transfer. The path followed by an electron in escaping from a reaction centre may be studied by means of electrochemistry, a key principle of which is the concept of redox potentials.
KeywordsElectron Paramagnetic Resonance Reaction Centre Redox Potential Green Plant Purple Bacterium
Unable to display preview. Download preview PDF.
- Mathis, P. and Rutherford, A.W. (1987) The primary reactions of photosystems I and II of algae and higher plants. In Amesz, J., ed., Photosynthesis. New Comprehensive Biochemistry Vol. 15 Elsevier, Amsterdam, 63–96.Google Scholar
- Parson, W.W. (1987) The bacterial reaction center. In Amesz, J., ed., Photosynthesis. New Comprehensive Biochemistry Vol. 15 Elsevier, Amsterdam, 43–61.Google Scholar
- Brudvig, G.W. and de Paula, J.C. (1987) on the mechanism of photosynthetic water oxidation. In Biggins, J., ed., Progress in Photosynthesis Research, Proc. Int. Congr. Photosynth. Res., VIIth 1986 Martinus Nijhoff, Dordrecht, Vol. 1, 491–498.Google Scholar
- Davenport, H.E. (1972) Some observations on cytochrome f. In Forti, G., Avron, M. and Melandri, A., eds., Proc Int. Congr. Photosynth. Res., IInd 1971 1593–1601.Google Scholar
- Dutton, P.L. (1986) Energy Transduction in anoxygenic photosynthesis. In Staehelin, L.A. and Arntzen, C.J., eds., Photosynthesis III. Photosynthetic membranes and light harvesting systems. Encycl. of Plant Physiol. New series, Vol. 19, Springer-Verlag, Berlin, 197–237.Google Scholar
- Lavorel, J. and Etienne, A-L. (1977) In vivo chlorophyll fluorescence. In Barber, J., ed., Primary Processes in Photosynthesis, Topics in Photosynthesis Vol. 2, Elsevier/North Holland Biomedical Press, 203–268.Google Scholar
- Mansfield, R.W., Nugent, J.H.A. and Evans, M.C.W. (1987) Investigation of the chemical nature of the electron Acceptor A1 in photosystem I of higher plants. In Biggins, J., ed., Progress in Photosynthesis Research, Proc. Int. Congr. Photosynth. Res., VIIth 1986 Martinus Nijhoff, Dordrecht, Vol. 1, 241–247.Google Scholar
- Nuijs, A.M., Shuvalov, V.A., Smit, H.W.J., van Gorkom, H.J. and Duysens, L.N.M. (1987) Excited states and primary photochemical reactions in photosystem I. In Biggins, J., ed., Progress in Photosynthesis Research, Proc. Int. Congr. Photosynth, Res., VIIth 1986 Martinus Nijhoff, Dordrecht, Vol. 1, 229–232.Google Scholar
- Trebst, A. (1986) The topology of the plastoquinone and herbicide binding peptides of photosystem II in the thylakoid membrane. Z. Naturforsch. 41c, 240–245.Google Scholar
- Trebst, A. (1988) Herbicide action of photosynthetic membranes. In Harwood, J.L. and Walton, T.J., eds., Plant Membranes—Structure, Assembly and Function Biochem. Soc., London, 201–208.Google Scholar