Fig. 4
From: Whole plant chamber to examine sensitivity of cereal gas exchange to changes in evaporative demand
Whole plant gas exchange versus vapour pressure deficit (VPD) for a representative barley (cv. Steptoe) plant. a Chamber VPD and leaf temperature; b whole plant transpiration (TrIRGA), c whole plant net photosynthesis (An), and d intrinsic water use efficiency (iWUE) versus VPD. Each point represents a median value for data collected at 20 s intervals over 3–5 min of steady state gas exchange, steady state at different VPD having been established every 20–30 min