Figure 3.

COI1 is required for full opening of stomata, but not for stomatal response to RH. A, Stomatal aperture width was measured in intact leaves of Col-0 and coi1-1 plants 4 h after dip inoculation into bacterial suspensions (10⁸ CFU mL⁻¹) of Pst DC3118 (cor⁻ mutant) or water control (mock inoculation). Results are shown as the mean (n = 60) ± se. Different letters above the bars indicate statistical significance (P < 0.05) calculated with ANOVA. B, The graph shows stomatal aperture width in untreated, intact leaves of Col-0 and coi1-1. The asterisks above the coi1-1 bars indicate statistical significance (P < 0.001) in comparison to Col-0 as calculated with two-tailed Student’s t test.