CELL BIOPHYSICS Kinetic Model of Primary Photosynthetic Processes in Chloroplasts. Description of the Fast Phase of Chlorophyll Fluorescence Induction under Different Light Intensities

Abstract-s-A kinetic model was developed for generation and utilization of the transmembrane electro-chemical proton gradient in primary photosynthetic processes in chloroplasts. The model gives a detailed description of the catalytic cycles in photosysterns J and II, the cytochrome b,:t"cornplcx, ATP synthesis, and passive leakage of H+, K+, and CI- through the thylakoid membrane. Account is taken of the dependence of the electron transport rate on the transmembrane potential. The model was tested for consistency with the experimental data on the fast phase of chlorophyll fluorescence induction under different light intensities (high to low). The composition of the fluorescence response was analyzed for each illumination level. Key words: regulation, photosynthesis, mathematical model, fluorescence inductio