Fig. 4.

Effect of a sudden change in transpirational demand on root water flow (scaled by leaf area). (A) Root water flow of control plants (‘Light control’). (B) Root water flow 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) Water flow of plants growing at high relative humidity (‘High RH’), of plants removed from high RH after 4h (‘RH decrease, 4h’), and of plants removed from high RH after 28h (‘RH decrease, 28h’). Data show the means ±SE; n=5 plants. Significant differences are indicated by unique letters (P ≤ 0.05).