Figure 2.

Recovery of stomatal responses to light stress at 3 and 6 h after an initial 10-min white light stress treatment. A, Local and systemic stomatal aperture responses to a second 10-min white light stress treatment applied to a local or systemic leaf 3 or 6 h after the initial 10-min white light stress treatment. B and C, Local and systemic stomatal aperture responses to a 15-min treatment of H₂O₂ (250 μm; B) or ABA (20 μm; C) applied to the entire plant at 3 or 6 h after the initial 10-min white light stress treatment. White and black bars indicate the stomatal response of local and systemic leaves to 0-, 10-, or 15-min treatments, respectively. Statistical analysis was conducted using ANOVA followed by Tukey’s honestly significant difference (HSD) mean-separation test and indicated by lowercase letters; n = 500 stomata from 10 different plants. Error bars indicate the mean ± se, P < 0.05. HL, High light.