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Changes in GSH levels of excised leaves in response to light and to cryptogein treatment. Comparisons of leaves incubated in the dark (A and B), in a dark/light cycle (C and D), and under continuous light (E and F) are shown. A, C, and E, Total GSH levels. B, D, and F, Proportion of reduced GSH. Co, Control; Cr, cryptogein; DD, dark; DL, 12 h/12 h of dark/light cycle; LL, light. Measurements were done with eight leaf discs (four leaves from four different plants, two discs per leaf).
