Figure 6.

Analysis of antioxidant enzyme activities in wild-type (wt) and GO5 plants. A and B, APX (A) and CAT (B) activity quantification of leaf extracts from 21-d-old plants grown at 75 μmol quanta m⁻² s⁻¹ or exposed for 6 h to 200 μmol quanta m⁻² s⁻¹. Plants were grown under ambient atmospheric CO₂ concentration (380 μL L⁻¹). The values presented are means ± se of over three replicate experiments. Significant differences in the mean values from the wild type according to the Student's t test are indicated with asterisks (P < 0.05). μE, μmol quanta m⁻² s⁻¹. C, In gel test for SOD activity using 15 μg of total protein leaf extract from wild-type and GO5 plants grown at 75 μmol quanta m⁻² s⁻¹. chl, Chloroplastic; cyt, cytosolic.