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Primary photochemical reactions in chloroplast photosynthesis

Published online by Cambridge University Press:  17 March 2009

Alan J. Bearden  and
Richard Malkin
Alan J. Bearden
Affiliation:
Donner Laboratory
Richard Malkin
Affiliation:
Department of Cell Physiology, University of California, Berkeley, California 94720 (U.S.A.)
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Photosynthesis begins with the absorption of light energy and this absorbed energy is transferred to special sites, termed reaction centres. At these sites, the light energy is transformed into chemical products through an oxidation-reduction reaction that generates the primary reactants, an oxidized pigment molecule (P+) and a reduced electron acceptor (A–) (Clayton, 1972). The subsequent reactions of these species in the dark ultimately results in the formation of chemical products required for the fixation of CO2. In this essay we will discuss the nature of the primary reactants generated in the light reactions of chloroplast photosynthesis, stressing recent advances in the identification and characterization of such reactants.

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Research Article
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Quarterly Reviews of Biophysics , Volume 7 , Issue 2 , May 1974 , pp. 131 - 177
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Copyright © Cambridge University Press 1974

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References

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