Fig. 6From: Elevated CO2 can modify the response to a water status gradient in a steppe grass: from cell organelles to photosynthetic capacity to plant growthEffects of elevated CO2 on total water use (a), total biomass water use efficiency (b, WUEt) with water status gradient; and WUEt relationships with total water use (c), and total biomass (d). In (a) and (b) panels, for watering treatment and bar details, see Fig. 2 Back to article page