Table 3.
Bioconcentration factor (BCF), translocation factor (TF) and tolerance index (TI) of quinoa plants exposed to various concentrations of cadmium and lead under hydroponic conditions.
| Cd | Pb | ||||||
|---|---|---|---|---|---|---|---|
| Treatments (µM) | BCF Shoot | BCF Root | TF | BCF Shoot | BCF Root | TF | TI |
| Cd 50 | 8.83 ± 0.5 b | 9.8 ± 0.4 c | 0.9 ± 0.05 a | – | – | 0.18 ± 0.005 b | 76.5 ± 3 b |
| Cd 100 | 5.78 ± 0.2 c | 6.4 ± 0.8 d | 0.90 ± 0.04 a | – | – | 0.21 ± 0.008 a | 61.8 ± 2 c |
| Pb 250 | – | – | 0.5 ± 0.03 c | 4.30 ± 0.05 a | 24.4 ± 1.8 ab | 0.16 ± 0.01 b | 88.2 ± 3 a |
| Pb 500 | – | – | 0.8 ± 0.02 b | 2.90 ± 0.04 c | 17.6 ± 1.5 c | 0.16 ± 0.005 c | 76.5 ± 3.1 b |
| Cd 50 + Pb 250 | 9.79 ± 0.5 b | 12.5 ± 0.7 b | 0.79 ± 0.05 b | 3.67 ± 0.2 b | 22.8 ± 2.4 b | 0.16 ± 0.003 c | 70.6 ± 3 bc |
| Cd 100 + Pb 250 | 6.67 ± 0.4 c | 7.6 ± 0.5 d | 0.88 ± 0.02 a | 1.59 ± 0.1 d | 10.2 ± 1.2 d | 0.16 ± 0.005 c | 52.9 ± 1.5 d |
| Cd 50 + Pb 500 | 13.3 ± 0.3 a | 16.9 ± 0.6 a | 0.79 ± 0.03 b | 4.83 ± 0.2 a | 27.0 ± 2.5 a | 0.18 ± 0.006 b | 47.1 ± 2.5 e |
| Cd 100 + Pb 500 | 8.77 ± 0.2 b | 10.6 ± 1.2 bc | 0.82 ± 0.04 b | 1.93 ± 0.2 d | 11.6 ± 1.3 d | 0.17 ± 0.003 c | 38.2 ± 2 f |
Data presented are the mean values (n = 4) followed by the standard error. Different letters in each column represent the significant difference at a 5% probability level.