Fig. 8.

Diagram of the ET reactions used in the model of Lazár (2009) (A), the O-J-I-P ChlF transients measured on control (= untreated) leaves, as well as on leaves treated with 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB, which inhibits ET in the cytochrome b₆/f, see A) or with methyl-viologen (MV, which accepts electrons from the iron–sulfur cluster of PSI and ferredoxin, Fd, see A) (B), and the respective curves simulated with the model (C), the ΔA₈₂₀ curves measured under the same conditions (D), and the respective curves simulated by the model (E). The curves are shown on a logarithmic time scale. Abbreviations: S_i, the S-states of the oxygen-evolving complex (OEC); f, b_L, b_H^…c, cytochrome f, low/potential cytochrome b₆, and high-potential cytochrome b₆ in kinetic equilibrium with the haem c of cytochrome b₆/f complex; PC, plastocyanin. Modified from Lazár (2009).