Fig. 1.

Net photosynthetic rates (A_gr) and stomatal conductance (g_gr) for each growth [CO₂] level (aCO₂, ambient [CO₂]; eCO₂, elevated [CO₂]) and watering level (WW, well-watered conditions; WD, water deficit) . Mean values and standard errors (error bars) are provided. The number of replicates for each treatment and genotype combination is three to four. *Significant differences (Fisher’s least significant difference post-hoc test) between watering levels within the same growth [CO₂] level; #significant differences between growth [CO₂] levels within the same watering level. The comparisons are made with respect to the following treatments: WW – eCO₂ and WD – aCO₂.