Table 2.
Effects of SO2 donor pretreatment on wheat grain germination under 15 mM Al3+ stress. Wheat grains were pretreated with 0, 0.4, 0.8, 1.2, 1.6, and 2.0 mM SO2 for 12 h and subsequently subjected to 15 mM AlCl3 for further 48 h, and then germination was investigated.
| SO2 donor concentration (mM) |
0.0 | 0.4 | 0.8 | 1.2 | 1.6 | 2.0 |
|---|---|---|---|---|---|---|
| Germination percentage (%) | 37 ± 3.3a | 42 ± 2.7a | 44 ± 3.5a | 56 ± 3.8a | 48 ± 2.7a | 47 ± 3.1a |
| Length of radicle (cm) | 1.42 ± 0.6a | 1.72 ± 0.4a | 1.80 ± 0.7a | 1.82 ± 0.7a | 1.78 ± 0.8a | 1.62 ± 0.4a |
| Length of coleoptile (cm) | 4.64 ± 0.4a | 4.70 ± 0.6a | 5.20 ± 0.5a | 5.83 ± 0.8a | 5.40 ± 0.8 | 5.23 ± 0.6a |
| Radicle number (50 grains) | 127 ± 7.3a | 135 ± 8.1a | 139 ± 8.1a | 148 ± 7.9a | 130 ± 6.7a | 119 ± 7.1a |
Values are the means ± SD (n = 6). Different letters mean significance of difference between different treatments (P < 0.05).