Fig. 3

Glutathione production in leaves and roots of drought-stressed maize. A-F) Steady state levels of glutathione (a, b), the glutathione precursor γ-EC (c, d) and cysteine (e, f) in leaves (a, c, e) and roots (b, d, f) of maize plants with sufficient (black) and restricted (white) water supply. g, h Relative transcript levels of the γ-EC-synthase (GSH1) in leaves (g) and roots (h) of drought-stressed plants. Data are means ± SD of five (a-f) or three (g) individual replicates. Asterisks indicates statistical differences as determined by the unpaired t-test (*, 0.05 ≥ p > 0.01; **, 0.01 ≥ p > 0.001; ***, p ≤ 0.001)