The e.s.r. method has been used to investigate the kinetics of photo-induced redox conversions of the P700 reaction centres of photosystem I in the leaves of higher plants. It is shown that the non-monotonic kinetics of the redox conversions of P700 appearing on continuous illumination with white light of leaves adopted to the dark and far red light is due to acceleration of the efflux of electrons from photosystem I. From the results it is assumed that this acceleration is due to increase in the concentration of the acceptors of photosystem I-NADP+. It is shown that in the experimental conditions electron transport between photosystems is not inhibited.
|Number of pages||6|
|Publication status||Published - Dec 1 1988|
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