Table II.
Parameters of the Michaelis-Menten model for Cd and Zn absorption by mesophyll protoplasts (n = 4, sd in parentheses)
Plant Used for Protoplast Extraction
|
Cd
|
Zn
|
||||
---|---|---|---|---|---|---|
Vmax | Km | R2 | Vmax | Km | R2 | |
μm min-1 0.25 μL-1 protoplasts | μm | μm min-1 0.25 μL-1 protoplasts | μm | |||
T. caerulescens “Ganges” | 0.50 (0.08) | 9.68 (5.78) | 0.976a | 0.27 (0.03) | 4.01 (1.90) | 0.996a |
T. caerulescens “Prayon” | 1.15 (0.14) | 4.83 (2.11) | 0.977a | 0.53 (0.08) | 12.30 (5.80) | 0.961a |
A. halleri | 0.78 (0.10) | 4.81 (2.13) | 0.983a | 0.05 (0.01) | 3.35 (4.42) | 0.983a |
2α < 0.001.