Fluorescence and Photochemical Investigations of Phytochrome in Higher Plants
Figure 6
The energy level scheme of the photoreaction of the initial red-absorbing phytochrome form (Pr) into the first photoproduct (lumi-R) stable at low temperatures via a short-lived unstable orthogonal intermediate (prelumi-R); , -absorption coefficients; k, -constants of: fluorescence (, ), temperature-independent degradation of excitation (, ), initial photoreaction (, ), phototransformation into photoproduct (), and return into the initial state (); and , activation energy barriers of the direct and reverse photoreactions. The prime sign () relates to lumi-R. (From [35]).
