[Effect of oxidizing and reducing agents on the rate of water proton relaxation in the chloroplasts of beans and particles of photosystem 2].

The change of longitudinal proton relaxation rate, 1/T1, in the native and shocked chloroplasts, PS2 chloroplasts' particles and exogenous complexes Mn2+--PPCI (pigment--protein complex of PSI), Mn2+--PPCII in the presence of the PS2 donors and acceptors and at different pH change were studied. It has been shown that 1/T1 increases in chloroplasts and PS2 particles in the presence of the PS2 donors and decreases in the presence of the acceptors in contrast to untreated preparations. The 1/T1 change of exogenous complexes is not specific.