Figure 5
The effect of 40 mM K 2 C 2 O 4 and 80 mM KCl treatment on the F v /F m (A) and OJIP curves (normalized, B) in tobacco leaves in the presence of chloramphenicol (CM). ■, - CM; □, + CM. Leaf discs (10 mm diameter) were immersed into solutions with 1 mm CM for 3 h in the dark, then kept in high light (800 μmol m-2 s-1) for 2 h. Fv/Fm and Ψo were measured after 2 h high light treatment. CK were leaves without K2C2O4 and KCl treatment. Different letters indicate significant differences between leaves with different treatments (P < 0.05). Values were means ± SE (n = 8).