Figure 7

Relations between LHCII/PSII (A) and PSI/PSII (B) ratios and the relative content of xanthophylls on thylakoids. Parameters were measured for wild-type and 11 xanthophyll biosynthesis mutants plants previously described ([12]; present ms). LHCII/PSII and PSI/PSII ratios were determined on thylakoid membranes by quantitative western blot, while xanthophyll/carotenoid ratios were quantified by HPLC. Both distributions were fitted with exponential functions (y = y_o + a·e^bx); R_LHCII/PSII² = 0.76; R_PSI/PSII² = 0.78.