Table 3.
Effect of growth regulators for in vitro flowering in O. umbellata L.
| Growth regulator | Concentration (mg/l) | Duration required | No. of flowers | % flower formed |
|---|---|---|---|---|
| Control | – | – | – | |
| NAA | 0.15 | – | – | |
| 0.30 | 5 weeks | 2.2 ± 0.4c | 62.34 ± 0.8c | |
| 0.50 | 2.1 ± 0.2c | 63.89 ± 1.6c | ||
| 0.70 | 4.5 ± 0.5a | 67.43 ± 1.3b | ||
| 1.0 | 4.2 ± 0.2b | 68.91 ± 0.7a | ||
| BA | 0.5 | – | – | |
| 1.0 | 3.7 ± 0.3 | 70.12 ± 1.7 | ||
| 1.5 | 5.5 ± 0.7a | 74.33 ± 1.2a | ||
| NAA + CM | 0.7 + 0.4% | 2.3 ± 0.3 | 71.79 ± 1.1a | |
| 1.0 + 0.4% | 3.4 ± 0.2a | 69.22 ± 1.4 | ||
| BA + CM | 0.5 + 0.4% | 4 weeks | 2.2 ± 0.4 | 63.24 ± 1.8c |
| 1.0 + 0.4% | 4.6 ± 0.3 | 69.87 ± 1.3b | ||
| 1.5 + 0.4% | 12.3 ± 0.8b | 78.65 ± 0.6a | ||
| NAA + BA + CM | 0.7 + 1.0 + 0.4 % | 13.4 ± 0.6a | 80.87 ± 0.9a | |
| 0.7 + 1.5 + 0.4% | 3 weeks | 22.8 ± 0.7a | 92.73 ± 1.4a | |
| 1.0 + 1.0 + 0.4% | 15.8 ± 0.4 | 85.14 ± 0.8 | ||
| 1.0 + 1.5 + 0.4% | 16.7 ± 0.3 | 86.67 ± 1.1 |
Values are mean ± SE, five cultures per treatment, repeated thrice. Within a column, means having the same letters are not significantly different at the 5% level according to Holm–Sidak test.