In this studies we used classical and laser methods for cyanobacteria diagnostics: Fluorescence
Induction and Relaxation and Non-Linear Laser Fluorimetry in order to obtain the whole set of
photophysical parameters of cyanobacteria.
Different photophysical processes that take place in photosynthetic apparatus of cyanobacterium
Synechocystis sp. PCC6803 were studied with mentioned above fluorescent methods and sets of
photophysical parameters were determined. The results allow us to suggest a model of photo
adaptation processes under excess irradiance (depending on light intensity and spectrum).