FIGURE 4.

Effect of high/low light illumination on the initial amplitudes of flash-induced fluorescence decay in WT (triangles), ΔpsbA3 (circles), and ΔpsbA1A2 (squares) mutants. Cells grown at 50 μmol m⁻² s⁻¹ were exposed to 500 μmol m⁻² s⁻¹ light for 2 h followed by a 2-h recovery period under normal growth light (50 μmol m⁻² s⁻¹). Data are presented as mean ± S.D. of three independent biological repetitions. In some instances, the error bars are smaller than the symbols.