Levels of chlorophyll and various antioxidants in WT leaves and leaves of pdx1 after long-term exposure to high light (1000 μmol m-2 s-1, 10°C, 7d). A) Ascorbate, B) α-Tocopherol, C) Total chlorophyll, D) Chlorophyll a/b ratio, E) β-carotene (car) and xanthophylls (lutein (lut), violaxanthin (vio), antheraxanthin (ant), zeaxanthin (zea), neoxanthin (neo)). Data are mean values of 3 measurements + SD. C = control plants; S = plants exposed to the high light treatment. *, ** and ***, significantly different from the WT value with P < 0.001, 0.035 and 0.01, respectively (t test). White bars, WT; black bars, pdx1 mutant.