Figure 2.

Changes in leaf cellular activities of glutathione reductase (GR) and catalase (CAT) enzymes in C. arabica cv. Geisha 3, cv. Marsellesa and their Hybrid (Geisha 3 × Marsellesa) plants grown under 400 or 700 μLCO₂ L⁻¹ at control (25/20 °C, day/night), submitted to supra-optimal temperatures (37/28 °C, 42/30 °C) and after 14 days of recovery (Rec14). For each enzyme, the mean values ± SE (n = 3 plants) followed by different letters express significant differences between CO₂ treatments for each temperature, separately for each genotype (a, b), or between temperatures for the same CO₂ treatment (A, B, C), always separately for each genotype, where a > b and A > B > C.