FIGURE 7.

Antioxidant activities of CsGG3.2 over-expressing T1-transgenic and WT plants under cold stress. (A) Superoxide dismutase (SOD), one unit of enzyme activity defined as 50% formazan synthesis inhibited in the xanthine oxidation coupling reaction solution. (B) Peroxidase (POD), one unit of enzyme activity defined as the absorbency at 470 nm increased by 0.01 in 1 ml reaction solution min^-1 per gram tissue. (C) Catalase (CAT) activity, one unit of enzyme activity defined as 1 nmol H₂O₂ oxidized min^-1 per gram tissue. (D) Glutathione reductase (GR), one unit of enzyme activity defined as 1 nmol NADPH oxidized min^-1 per gram tissue. Data shown are averages ± SE (n = 3). Three biological replicates were included for each experiment and 10 seedlings were included for each line. The asterisks indicate a significant difference between WT and CsGG3.2 over-expressing plants (^∗p < 0.05 and ^∗∗p < 0.01).