Figure 4.

Analysis of the kinetics of chlorophyll fluorescence quenching in LHCIIb induced by pH 5.5. Squares and circles are experimental data for LHCII from dark-adapted (D) and light-treated (L) leaves, respectively. Solid lines are theoretical curves derived from curve-fitting analysis using two components; the first expresses a second-order reaction, and the second is a constant component, F_u (shown as dotted lines; for more details, see text). The bottom plot represents a linearization of the experimental and theoretical data from the upper plot using a calculated value of F_u (see Table III). Parameter dependencies were within 0.4 to 0.8. The norm was equal to 4.0. The average curve-fit error was 1.3%. The coefficient of variation of parameters was within 0.7% to 3.6%. See text for definitions.