Mesophyll conductance to CO₂ (g_mes), per treatment (control, C; winter resprouts, RW; summer resprouts, RS) and season (winter, summer). In summer, the time of day was included (morning, midday, evening). Values are mean ±SE of 10 replicates. Significant differences (p ≤ 0.05) are indicated by different letters (treatment (a, b, c), season (A, B) and, in summer, time of day (α, β, γ).