Figure 5

Effect of 1.0 mM melatonin on stress physiological indices during dark-induced gardenia leaf senescence. (A) H2O2 accumulation was detected by DAB staining. (B) O2 −accumulation was detected by fluorescence probe. (C) Other physiological indices. The values represent the means ± SDs, and different letters indicate significant differences according to Duncan’s multiple range test (P < 0.05).