Fig. 4.

Effect of stomatal features on transpiration efficiency. (A) Steady-state stomatal conductance calculated from gas exchange measurements on mature leaves. (B) Stomatal densities (abaxial epidermis). (C) Stomatal index (abaxial epidermis). Error bars denote the SEM. Statistical values for differences within categories were calculated using a one-way ANOVA followed by Tukey’s multiple comparisons test. (D, E) Examples of stomatal densities (D: G278, high stomatal density; E: SW111, low stomatal density). Confocal images of abaxial epidermis stained with propidium iodide.