An Insight into the Bicarbonate Effect in Photosystem II through the Prism of the JIP Test

Photosystem II (PSII) is the unique pigment–protein complex that capable of evolving molecular oxygen using solar energy. The activity PSII determines overall productivity all oxygenic photosynthetic organisms. It well known absence HCO3− induces a drop in PSII. However, it not yet clear what type photochemical reaction, single turn-over or multiple turn-over, involved in. Kinetic parameters this (these) involvement(s) are almost unexplored now. This work addresses these issues. Using JIP test, being perspective noninvasive method for measuring plants, paper describes how deficiency affects electron transfer on oxidizing as reducing sides thylakoids and preparations from leaves pea plants. was found to be simultaneously both events (“dynamical processes”). Moreover, involvement dynamical processes revealed associated with PSII, rate limiting side, which follows obtained kinetic parameters. constant exchangeable ligand discussed donor acceptor