Figure 6: Effects of H2S on the activities of ascorbate peroxidase (APX) in grape peels (a) and pulp (b), catalase (CAT) in peels (c) and pulp (d), and lipoxygenase (LOX) in peels (e) and pulp (f). Grape clusters were fumigated with 1.0 mM H2S donor NaHS aqueous solution with water as the control groups for 0–7 d. Data are presented as means ± SD (). FW = fresh weight.