Table 2.
Effects of different concentration of Cd2+ (0, 5, 10, 30, 40, and 80 μmol L−1) on organic solute content of U. prolifera and U. linza.
| Cd2+ treatment | SS | FAA | PRO | OA | SP | |
|---|---|---|---|---|---|---|
| μmol L−1 | mmol g−1 DW | mmol g−1 DW | mmol g−1 DW | mmol g−1 DW | mg g−1 DW | |
| U. prolifera | 0 | 0.15 ± 0.02 b | 1.03 ± 0.05 b | 0.13 × 10−3 ± 0.02 × 10−3 e | 0.17 ± 0.01 a | 42.15 ± 2.33 a |
| 5 | 0.15 ± 0.02 b | 1.29 ± 0.12 a | 0.33 × 10−3 ± 0.02 × 10−3 d | 0.17 ± 0.01 a | 41.38 ± 2.76 a | |
| 10 | 0.12 ± 0.01 bc | 1.10 ± 0.04 ab | 0.69 × 10−3 ± 0.04 × 10−3 c | 0.19 ± 0.02 a | 40.45 ± 1.86 a | |
| 20 | 0.10 ± 0.01 c | 0.49 ± 0.11 c | 1.06 × 10−3 ± 0.07 × 10−3 b | 0.16 ± 0.02 a | 38.39 ± 2.75 ab | |
| 40 | 0.14 ± 0.01 b | 0.22 ± 0.05 d | 1.47 × 10−3 ± 0.09 × 10−3 a | 0.12 ±0.01 b | 35.53 ± 2.63 b | |
| 80 | 0.19 ± 0.01 a | 0.13 ± 0.06 d | 1.52 × 10−3 ± 0.12 × 10−3 a | 0.09 ± 0.01 c | 24.35 ± 1.88 c | |
|
| ||||||
| U. linza | 0 | 0.10 ± 0.01 cd | 1.23 ± 0.03 b | 0.15 × 10−3 ± 0.05 × 10−3 f | 0.11 ± 0.02 a | 39.27 ± 1.22 a |
| 5 | 0.10 ± 0.01 cd | 1.43 ± 0.09 a | 0.37 × 10−3 ± 0.02 × 10−3 e | 0.12 ± 0.01 a | 38.89 ± 2.37 ab | |
| 10 | 0.07 ± 0.01 d | 1.21 ± 0.10 b | 0.78 × 10−3 ± 0.03 × 10−3 d | 0.13 ± 0.01 a | 38.52 ± 2.67 ab | |
| 20 | 0.10 ± 0.01 c | 1.20 ± 0.06 b | 1.24 × 10−3 ± 0.08 × 10−3 c | 0.14 ± 0.02 a | 37.13 ± 1.89 ab | |
| 40 | 0.14 ± 0.02 b | 0.97 ± 0.06 c | 1.71 × 10−3 ± 0.07 × 10−3 b | 0.12 ± 0.01 a | 35.95 ± 2.41 b | |
| 80 | 0.19 ± 0.01 a | 0.76 ± 0.08 d | 1.87 × 10−3 ± 0.15 × 10−3 a | 0.08 ± 0.01 b | 29.34 ± 1.87 c | |
Different letters in the same column indicate statistical difference according to Duncan's multiple range test (P ≤ 0.05). “SS, FAA, PRO, OA, and SP” in the table indicate the content of soluble sugar, free amino acid, proline, organic acid, and soluble protein, respectively.