Table 1.
Length, and fresh and dry weight of primary seminal roots of young maize plants grown hydroponically for 10 d and exposed to various concentrations of Cd and/or Si
| Treatment | Root length (cm) | Root f. wt (mg) | Root d. wt (mg) |
|---|---|---|---|
| C | 15·03 ± 1·39a | 176·3 ± 19·1a | 7·6 ± 1·1a |
| Cd5 | 12·97 ± 0·54b | 152·9 ± 8·9b | 6·6 ± 0·4b |
| Cd5 + Si | 17·23 ± 1·53c | 174·7 ± 25·0a | 7·5 ± 0·7a |
| Cd50 | 9·49 ± 1·09d | 95·1 ± 3·6c | 6·0 ± 0·5c |
| Cd50 + Si | 10·45 ± 0·80e | 135·8 ± 18·6d | 7·7 ± 0·4a |
| Si | 17·53 ± 1·28c | 216·5 ± 27·3e | 10·1 ± 0·8d |
C, control; Cd5, 5 µm Cd; Cd5 + Si, 5 µm Cd with 5 mm Si; Cd50, 50 µm Cd; Cd50 + Si, 50 µm Cd with 5 mm Si; Si, 5 mm Si. Values are means ± s.d. (n = 15). Different letters indicate significant differences among the treatments at P < 0·05 %.