Bicarbonate protects the donor side of photosystem II against photoinhibition and thermoinactivation.

The rate of photoinhibition of photosystem II (PSII) activities (photoinduced change of chlorophyll fluorescence yield, deltaF, and photoreduction of 2,6-dichlorophenol-indophenol) in O2-evolving pea subchloroplast membrane fragments in medium depleted of CO2 was considerably decreased upon addition of 5 mM NaHCO3 before the light treatment. A similar… CONTINUE READING