Fig. 3.

Effect of a sudden change in transpirational demand on stomatal conductance. (A) Stomatal conductance of control plants (‘Light control’). (B) Stomatal conductance of shaded plants (‘Shade’), of plants removed from shade after 4h (‘Light increase, 4h’), and of plants removed from shade after 28h (‘Light increase, 28h’). (C) Stomatal conductance of plants growing at high relative humidity (RH) after a step change in RH. Stomatal conductance was measured 5min (‘RH decrease, 5 min’), 4h (‘RH decrease, 4h’), and 28h (‘RH decrease, 28h’) after the decrease in humidity. Data show the means ±SE; n=5 plants. Significant differences are indicated by unique letters (P ≤ 0.05).