Figure 4

Stomatal conductance in the hsi2-2 mutant and corresponding wild-type (Col-0). Stomatal conductance was measured in fully developed young leaves (A) 1 d after watering or (B) 72 h after root drench treatment with 0 or 20 μM PBI425 (in 0.05% ethanol). Data presented as means of three replicates ± standard error of means, each containing 4–6 plants and measurements from two leaves per plant. The experiments were repeated twice with similar results.