Figure 3.
ABA and membrane permeability. (A) The effect of treating aba1 plants for 1, 2, and 3 h with ABA on stomatal aperture and Pos values of leaf protoplasts. Details are as in Fig. 2. (B) The effect of 1 or 3 h of ABA treatment of excised leaves from the wt and aba1 mutant on stomatal aperture and Pos values of leaf protoplasts.