[Comparative experimental and theoretical study of the dependence of parameters of curved induction of fluorescence and millisecond delayed luminescence on dark adaptation time].

The dependences of G = (Fm - Fs)/Fm parameter for slow fluorescence induction and delayed luminescence induction curves on adaptation time t(ad) were obtained both in experiment, for the leaves of Hibiscus rosa chinensis in vivo, and in a theoretical study with the help of the theoretical model developed earlier. In both cases, the G(t(ad)) dependences have the form of curves with saturation, which are well described by G = A(1 - exp(-(t(ad)/T0)). Both in experiment and in theoretical calculations, G values for delayed luminescence were larger than for fluorescence. The ratio of saturation times for G(t(ad)) for fluorescence and delayed luminescence was 1.40 for experiment and 1.46 for theoretical calculations. These results suggest that delayed luminescence induction is more sensitive to changes in the state of plant than the slow fluorescence induction.