Table 5.
Effect of silicon (Si) supplementation on reduced ascorbate (AsA), dehydroascorbate (DHA), AsA/DHA ratio, reduced glutathione (GSH), oxidized glutathione (GSSG) and GSH/GSSG ratio in rice seedlings treated with butachlor (Buta). Data are means ± standard error of three replicates.Values within the same row followed by the different letters are different at p < 0.05 according to the Duncan’s multiple range tests. FW = fresh weight.
| Parameter | Control | Si | Buta | Si + Buta | ||||
|---|---|---|---|---|---|---|---|---|
| Shoot | Root | Shoot | Root | Shoot | Root | Shoot | Root | |
| AsA µmol/g FW | 1.92 ± 0.0691a | 1.55 ± 0.0401c | 1.95 ± 0.058a | 1.66 ± 0.066b | 1.58 ± 0.057b | 1.19 ± 0.035d | 2.01 ± 0.052a | 1.57 ± 0.041b |
| DHA µmol/g FW | 0.231 ± 0.006b | 0.208 ± 0.007c | 0.219 ± 0.009c | 0.206 ± 0.005c | 0.251 ± 0.010a | 0.249 ± 0.007a | 0.205 ± 0.006c | 0.197 ± 0.006c |
| AsA/DHA | 8.31 ± 0.291c | 7.45 ± 0.268 f | 8.90 ± 0.356b | 8.06 ± 0.242d | 6.29 ± 0.226d | 4.77 ± 0.167d | 9.80 ± 0.274a | 7.97 ± 0.215e |
| GSH µmol/g FW | 1.03 ± 0.0419c | 0.866 ± 0.024e | 1.11 ± 0.032b | 1.04 ± 0.037d | 0.915 ± 0.023d | 0.750 ± 0.019 f | 1.65 ± 0.038a | 1.07 ± 0.031b |
| GSSG µmol/g FW | 0.109 ± 0.003b | 0.102 ± 0.003b | 0.109 ± 0.002b | 0.112 ± 0.003b | 0.145 ± 0.004a | 0.123 ± 0.003b | 0.149 ± 0.004a | 0.108 ± 0.003b |
| GSH/GSSG | 9.44 ± 0.274d | 8.49 ± 0.220 f | 10.18 ± 0.305b | 9.28 ± 0.269e | 6.31 ± 0.151 g | 6.09 ± 0.158 h | 11.07 ± 0.288a | 9.90 ± 0.277c |