Figure 7.

Analysis of three antioxidant enzyme activities and H₂O₂ accumulation in the control (WT and VC) and transgenic lines (OE-1, OE-7 and OE-35) under normal and drought/salt/osmotic conditions. Five-week-old plants were subjected to drought and salt treatments for 3 weeks. Two-week-old seedlings cultured on MS medium were transplanted to MS with mannitol (300 mM) and NaCl (200 mM) for 1 week, then the leaves were sampled to assess the SOD (A), POD (B), and CAT (C) activities and the H₂O₂ content (D). Data are the means ±SD calculated from three replicates. ^*(P < 0.05) and ^**(P < 0.01) indicate that the value in the transgenic lines is significantly different from that of the WT. Three biological experiments produced similar results.