Fig. 2.

Leaf hydraulic conductance (K_leaf), photosynthesis (A) and stomatal conductance (g_s) for the CO₂ × temperature chamber experiment. Measurements were taken with the youngest, fully expanded leaves. Growth [CO₂] was 400 ppm (ambient) or 700 ppm (elevated), and growth temperature was 27 °C (ambient) or 31 °C (elevated). K_leaf was measured for leaves sampled before sunrise, while A and g_s were measured at mid-day on the previous day. Asterisks denote significant treatments effects, and degrees of freedom for each data set are noted in the upper right corner of the graphs. Alpha levels for each hypothesis test can be found in Table 1.