Figure 4
Effect of K 2 C 2 O 4 (40 mM) and KCl (80 mM) treatment on ETR (A), NPQ (B) and qP (C) in tobacco leaves. Leaf discs (10 mm diameter) were infiltrated with K2C2O4 (40 mm) and KCl (80 mm) under darkness for 3 h, followed by exposure to intense light (800 μmol m-2·s-1) for 2 hours. CK were leaves without any reagent treatment. Different letters indicate significant differences between leaves with different treatments (P < 0.05). Values were means ± SE (n = 8).