The probability method was used to describe delayed fluorescence of higher plants. The simplest model proposed is based on the notion of a complex of reaction centers in photosystem Il in which exposure to light induces separation of charges. The model includes pigments, donors and acceptors of electrons with a disrupted electron transport chain, with and without consideration for the nonradiative transition. The results obtained show that a multiexponential decay and a nonmonotonic kinetics of delayed fluorescence may arise in the course of back reactions occurring at the initial stages of electron transfer.
Department of Biophysics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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