Use of ESR and PMR Methods for the Study of Initial Photosynthesis Processes
It is shown that the compound responsible for the ESR Signal II is localized close to the water-splitting complex and its oxidized state is responsible for the paramagnetic properties. By comparison of the influence of the PS2 electron donors and acceptors on the 1/T1 values of chloroplasts, subchloroplast particles and the exogenous Mn2+-PPC I and Mn2+-PPC II complexes, the major contribution to 1/T1 by the Mn pool of the water-splitting complex, containing the Mn ions in a variety of oxidation states, is established.
KeywordsChlorophyll Manganese Glutathione MgCl2 Photosynthesis
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