Figure 3. Red actinic light (peak at 660 nm) dependence of NPQ in C. paradoxa (black filled circles) and Synechocystis sp. PCC 6803 (open circles) at room temperature and white light dependence of state transition (red filled circles, corresponding to right vertical axis) estimated by the ratio of PSI fluorescence (725 nm) to PSII fluorescence (695 nm) determined at 77 K.

Averages of at least three independent cultures are presented respectively and vertical bars indicate standard deviation.