Mathematical Model of the Millisecond Delayed Fluorescence
The delayed fluorescence (DF) of photosynthetizing organisms originates as a result of a recombination of the primary separated charges in the reaction center of Photosystem 2 (PS2)1,2. . The half-time for recombination of the radical pair P680+I- is about 2–4 nsec3 , but the presence of slower components of luminescence is due to the equilibrium of this pair with other states including electron carriers both in the donor and in the acceptor sides of PS2. The multitude of redox states, whose recombination leads to the delayed fluorescence, determines the big number of its kinetic components and considerably complicates the interpretation of data obtained by this method. Mathematical description of the kinetics of transitions between different states of the electron carriers with the rendering of changes in the functional parameters of the thylakoid membrane would increase the information obtaned by DF method. There exist mathematical models of the DF of simplified systems with a limited number of carriers (in the presence of diuron) 4,5.
KeywordsThylakoid Membrane Acceptor Side Proton Concentration Delay Fluorescence Kinetic Component
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