Delayed fluorescence induction transients: Mathematical modelling based on the chosen kinetic models

The paper deals with mathematical modelling of the transients obtained by fitting of delayed fluorescence (DF) induction trace. The transients are in certain, doubtless connection with electrochemical gradient (ECG) formed across thylakoid membranes upon illumination. The fitting of the C and D transients by using consecutive model for first-order reactions (A --> B --> C) showed that they might play a role of the intermediate (B), according to scheme down bellow: ("A(1) state")(ECG) --> (k1 (C transient)) C transient --> (k2 (C transient)) Products ("A(2) state")(ECG) --> (k1 (D transient)) D transient --> (k2 (D transient)) Products The two ECG controlled "states" (A(1) & A(2)) are not the same, which does not exclude some sort of proportionality. On the other hand, the E band, contributing mainly to the stationary level of DF induction trace, may be fitted by parallel model of at least two first-order reactions.