Stomatal conductance
Stomatal conductance (g s) was measured on abaxial leaf sides using a leaf porometer (SC-1 Leaf Porometer, Decagon Devices Inc, Pullman, United States) with a measurement range of 0 to 1,000 mmol m2 s-1 and a stated accuracy of ±10% of measurement from 0 to 500 mmol m2s-1. Porometer measurements took place over three days, with one leaf per plant measured each day (n = 3 measurements per plant), in conjunction with Tleaf. For analysis of provenance differentiation, we used the plant-level average of the 3 measurements per plant.