Table 2.
Pigment contents and stomatal conductance of quinoa plants exposed to various concentrations of cadmium and lead under hydroponic conditions.
| Treatments (µM) | Chl-a (µg g−1 FW) |
Chl-b (µg g−1 FW) |
Total Chl (µg g−1 FW) |
Stomatal Conductance (mmol m−2s−1) |
|---|---|---|---|---|
| Control | 245 ± 8.0 a | 140 ± 5.0 a | 385 ± 10.0 a | 500 ± 10.0 a |
| Cd 50 | 205 ± 7.0 bc | 110 ± 3.0 bc | 315 ± 13.0 bc | 450 ± 8.0 b |
| Cd 100 | 170 ± 3.0 cd | 95 ± 4.0 cd | 265 ± 4.0 d | 400 ± 15.0 c |
| Pb 250 | 210 ± 8.0 b | 115 ± 2.0 bc | 325 ± 10.0 cd | 470 ± 8.0 ab |
| Pb 500 | 190 ± 5.0 bc | 100 ± 2.0 cd | 290 ± 5.0 c | 430 ± 16.0 b |
| Cd 50 + Pb 250 | 180 ± 4.0 d | 90 ± 3.0 d | 270 ± 10.0 cd | 410 ± 18.0 bc |
| Cd 100 + Pb 250 | 160 ± 8.0 e | 80 ± 4.0 e | 240 ± 5.0 e | 350 ± 10.0 d |
| Cd 50 + Pb 500 | 140 ± 4.0 f | 65 ± 3.0 f | 205 ± 10.0 f | 310 ± 8.0 e |
| Cd 100 + Pb 500 | 110 ± 5.0 g | 55 ± 2.0 g | 165 ± 5.0 g | 265 ± 12.0 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.