Table 1.
Effects of waterlogging stress on the seed germination characteristics of ZS11 and the am mutant
| Waterlogging time (h) | Material | Relative survival rate (%)a | Relative root length (%)b | Relative stem length (%)c | Relative fresh weight (%)d | Relative vigor indexe |
|---|---|---|---|---|---|---|
| 12 | ZS11 | 95.8 | 53.1 | 62.2 | 79.0 | 0.61 |
| am | 100 | 55.1 | 88.9* | 84.5 | 0.89 | |
| 24 | ZS11 | 36.8 | 37.0 | 47.6 | 58.8 | 0.18 |
| am | 75.7*** | 52.6* | 86.1** | 82.7** | 0.65*** | |
| 36 | ZS11 | 16.7 | 9.2 | 34.1 | 43.4 | 0.06 |
| am | 46.1*** | 44.2** | 76.4** | 76.8*** | 0.35** |
aRelative survival rate (%) = (survival rate of treated seedlings/survival rate of control seedlings) × 100
bRelative root length (%) = (root length of treated seedlings/root length of control seedlings) × 100
cRelative stem length (%) = (stem length of treated seedlings/stem length of control seedlings) × 100
dRelative fresh weight (%) = (fresh weight of treated seedlings/fresh weight of control seedlings) × 100
eRelative vigor index = (survival rate of treated seedlings × stem length of treated seedlings)/(survival rate of control seedlings × stem length of control seedlings)
Statistically significant difference from ZS11 at each time point is indicated (Student’s t-test) as follows: ***P < 0.001; **P < 0.01; *P < 0.05