Figure 2. The effect of 0 (A) or 1 h (B) high light treatment on the OJIP transients in different pretreated tobacco leaves and the effect of high light treatment on the maximum quantum yield of photosystem II (Fv/Fm) (C) in different pretreated tobacco leaves All data are the average of 8 replicates. Different lowercase letters indicate significant differences (P<0.05).