Table 3.
Effects of glutathione and Pb on Pb uptake, accumulation coefficient (AC) and metal tolerance index (MTI) in broccoli
| Treatments | Pb uptake in plant (mg/g) | AC Factor | % MTI |
|---|---|---|---|
| Control | – | – | – |
| Pb | 0.91 ± 0.02c | 3.03 ± 0.008c | 82.92 ± 3.45a |
| GSH1 | – | – | – |
| GSH2 | – | – | – |
| GSH3 | – | – | – |
| GSH1 + Pb | 0.52 ± 0.002b | 1.75 ± 0.01b | 137.07 ± 3.54b |
| GSH2 + Pb | 0.43 ± 0.001a | 1.45 ± 0.04a | 148.4 ± 4.43a |
| GSH3 + Pb | 0.53 ± 0.004b | 1.75 ± 0.01b | 141.9 ± 5.54b |
Data display means ± SE of 4 replicates. Non-identical letters indicated significant differences between the treatments at P ≤ 0.05. C = un-contaminated control, Pb = contaminated control (300 mg/kg Pb), GSH1 = 25 μM Glutathione, GSH2 = 50 μM Glutathione, GSH3 = 75 μM Glutathione, Pb + GSH1 = 300 mg/kg Pb + 25 μM GSH, Pb + GSH2 = 300 mg/kg Pb + 50 μM GSH, Pb + GSH3 = 300 mg/kg Pb + 75 μM GSH