Figure 5
From: A rate equation model of stomatal responses to vapour pressure deficit and drought
As the value of the external cuticular wax factor increased (resistance to water flow across the cuticle increased) stomatal sensitivity to increased D declined, as revealed by the decreasing slope of the relationship between conductance and transpiration. Values for the wax factor are 0.5, 1.0 and 2 times the default value for the curves, reading left to right. The dashed lines are lines of constant D.