Electron Transport in Photosynthesis
Photosynthesis of prokaryotic cyanobacteria as well as that of eukaryotic algae and higher plants produces oxygen and the basic process is similar in them all.
A form of the Hill and Bendall ‘Z’ scheme of the sequence of processes and electron transport leading from water-splitting through NADP+ reduction is explained below.
Photon capture by the photosystem antennae and excitation transfer to PSII & I provide the energy for oxidation of water and electron movement to acceptors, which donate e– to biochemical processes, and for passage of protons into thylakoid lumen, for synthesis of ATP. The electron transport system may be considered in five parts:
a)A water-splitting complex
b)A photosystem complex