Fig. 2.

Radar graph displaying the photosynthetic activity and gas exchange characteristics of GSH primed broccoli plants grown under Pb stress. At the p ≤ 0.05 level of significance, each point in the radii is the average of 4 replicate for each treatment. C = un-contaminated control, Pb = contaminated control (300 mg/kg Pb), GSH1 = 25 μM L⁻¹ Glutathione, GSH2 = 50 μM L⁻¹ Glutathione, GSH3 = 75 μM L⁻¹ Glutathione, Pb + GSH1 = 300 mg/kg Pb + 25 μM L⁻¹ GSH, Pb + GSH2 = 300 mg/kg Pb + 50 μM L⁻¹ GSH, Pb + GSH3 = 300 mg/kg Pb + 75 μM L⁻¹ GSH