Table I.
Parameters of the linear component and Michaelis-Menten model used to resolve the kinetic of influx curves in Figure 2, A and C
| Ecotype | Vmax | Km | Angular Coefficient | r2 |
|---|---|---|---|---|
| nmol g root fresh wt−1 h−1 | μm | nmol g root fresh wt−1 h−1 μm−1 | ||
| Cd | ||||
| Ganges + Fe | 62.6 (5.97) | 1.05 (0.30) | 4.7 (0.16) | 0.99 |
| Ganges − Fe | 187.6 (33.2) | 1.00 (0.53) | 3.6 (0.92) | 0.96 |
| Prayon + Fe | 14.0 (5.78) | 1.21 (1.43) | 3.9 (0.15) | 0.99 |
| Prayon − Fe | 21.8 (8.3) | 0.93 (1.09) | 4.2 (0.23) | 0.99 |
| Zn | ||||
| Ganges + Fe | 298.3 (66.0) | 2.83 (1.72) | 4.9 (0.86) | 0.97 |
| Ganges − Fe | 294.7 (39.4) | 2.10 (0.84) | 5.4 (0.54) | 0.99 |
| Prayon + Fe | 203.8 (33.1) | 2.53 (1.17) | 6.1 (0.44) | 0.99 |
| Prayon − Fe | 282.7 (56.9) | 2.80 (1.56) | 5.8 (0.74) | 0.98 |
Eight different concentrations of Cd (0.2 to 50 μm) or Zn (0.5 to 100 μm) were used to study the influx kinetics of Cd and Zn over a 20-min uptake period. ses are shown in parentheses.