Diurnal patterns of whole plant H₂O gas exchange of plants grown at either AC or EC.

Plants were either exposed to the same CO2 concentration as their growth condition (panels A, D–ambient; panels C, F–elevated) or SEC (panels B, E). Panels A-C are whole plant transpiration rates and panels D-F are whole day-time WUE. Each point and error bars represent the averages and standard error of n = 14 respectively.