Figure 4From: A rate equation model of stomatal responses to vapour pressure deficit and droughtThe relationship between stomatal conductance and transpiration rate as D increases from approximately 0.5 kPa to approximately 5 kPa in steps of approximately 0.5 kPa. The uppermost line is for an unstressed leaf, the lowest line represents a leaf with a xylem water potential of -2.0 MPa. The dashed lines are lines of constant D.Back to article page