Figure 8 . Simulated effects of leaf hairs (contributing a
resistance of r h = 0.1 m2 s
mol-1 on (a) net CO2 assimilation rate
(A ), (b) transpiration rate (E ), (c) water use efficiency
(WUE = A/E ), and (d) leaf temperature
(T leaf), under various conditions for the X
variables listed in the legend. The ranges and default values for each X
variable were as follows: leaf size (0.01 to 0.30 m, default 0.1),
stomatal conductance (0.001 to 1.0 mol m-2s-1, default 0.18), PPFD (0 to 2000 µmol
m-2 s-1, default 1000), air
temperature (5 to 45oC, default 25), and ambient
humidity (0.002 to 0.03 mol mol-1, default 0.01).
Results for X = leaf size are shown for two air temperatures
(25oC and 10oC). The dashed grey
line indicates zero change. Note that % changes are shown for A ,E and WUE, whereas absolute changes are shown forT leaf.