Fig. 1
The average temperatures in the greenhouse during the experiment
Table 1
The effect of planting date and GA3 treatment on plant growth parameters of Freesia hybrida ‘Corona’
| Treatment | No. of days to sprout | No. of days to flower | No. of days to first floret coloration | Plant height (cm) | No. of leaves | |
|---|---|---|---|---|---|---|
| Planting date | 1st Dec. | 31.0±3.7 A | 117.7±4.4 A | 127.3±3.3 A | 43.7±6.1 A | 8.8±0.5 A |
| 15th Dec. | 20.9±2.5 B | 100.3±2.0 B | 109.4±2.1 B | 45.0±2.4 A | 7.2±0.4 B | |
| GA3 (mg·L−1) | 0 | 26.6±5.8 A | 111.1±11.9 A | 119.4±9.8 A | 42.0±3.5 B | 8.0±0.9 A |
| 75 | 26.5±5.5 A | 109.0±9.9 AB | 117.8±10.8 A | 43.5±4.1 AB | 8.0±0.8 A | |
| 150 | 24.7±7.6 A | 106.8±7.5 B | 117.9±9.8 A | 47.5±4.7 A | 8.0±1.1 A | |
| Planting date × GA3 | ||||||
| 1st Dec. | 0 | 31.0±4.7 a | 121.3±5.3 a | 127.9±4.6 a | 40.0±4.3 b | 8.8±0.3 a |
| 75 | 31.3±1.4 a | 118.1±1.1 ab | 127.5±2.3 a | 42.3±4.5 ab | 8.6±0.6 a | |
| 150 | 30.6±5.7 a | 113.6±1.6 b | 126.4±3.9 a | 48.6±7.2 a | 8.9±0.6 a | |
| 15th Dec. | 0 | 22.2±2.0 b | 100.8±3.6 c | 110.9±1.6 b | 44.0±1.0 ab | 7.2±0.1 b |
| 75 | 21.6±1.9 b | 100.0±1.1 c | 108.0±1.7 b | 44.7±4.3 ab | 7.3±0.5 b | |
| 150 | 18.9±2.9 b | 99.9±0.8 c | 109.3±2.5 b | 46.3±1.0 ab | 7.1±0.7 b | |
[i] Means that have same letters in each column are nonsignificant statistically at p = 0.05 (DMR test); values are means ± standard deviation; capital letters refer to main effects, while lower case letters refer to interactions
Table 2
The effect of planting date and GA3 treatment on flowering parameters of Freesia hybrida ‘Corona’
| Treatment | Inflorescence stem length (cm) | Inflorescence stem diameter (mm) | Floret head diameter (cm) | No. of florets per inflorescence | Fresh weight of inflorescence (g) | Water uptake (ml) | Vase life (days) | |
|---|---|---|---|---|---|---|---|---|
| Planting date | 1st Dec. | 34.7±6.9 B | 3.6±0.2 A | 4.6±0.3 A | 6.8±0.5 A | 7.9±1.0 A | 6.3±0.7 A | 6.8±1.5 A |
| 15th Dec. | 38.9±2.6 A | 3.0±0.2 B | 4.1±0.2 B | 6.9±0.4 A | 6.0±0.2 B | 6.6±2.4 A | 5.3±1.6 B | |
| GA3 (mg·L−1) | 0 | 32.9±5.2 B | 3.3±0.5 A | 4.1±0.1 B | 6.5±0.3 B | 6.5±0.9 B | 5.1±1.2 B | 5.0±2.0 B |
| 75 | 36.2±5.2 B | 3.3±0.3 A | 4.4±0.2 A | 6.7±0.2 AB | 6.7±0.8 B | 6.8±1.6 A | 6.0±1.6 AB | |
| 150 | 41.4±1.7 A | 3.4±0.4 A | 4.6±0.4 A | 7.2±0.5 A | 7.7±1.6 A | 7.6±1.4 A | 7.2±0.7 A | |
| Planting date × GA3 | ||||||||
| 1st Dec. | 0 | 28.6±4.2 c | 3.6±0.4 a | 4.2±0.1 bc | 6.4±0.5 b | 7.3±0.4 b | 6.1±0.6 b | 6.0±2.0 ab |
| 75 | 33.3±5.2 bc | 3.6±0.1 a | 4.6±0.2 ab | 6.6±0.1 ab | 7.4±0.3 b | 6.3±0.5 b | 7.0±2.0 a | |
| 150 | 42.3±0.8 a | 3.7±0.2 a | 5.0±0.1 a | 7.4±0.4 a | 8.9±1.2 a | 6.6±1.2 ab | 7.3±0.5 a | |
| 15th Dec. | 0 | 37.2±1.5 ab | 2.9±0.3 b | 4.0±0.1 c | 6.5±0.2 b | 5.7±0.3 c | 4.1±0.8 b | 4.0±1.7 b |
| 75 | 39.2±3.7 ab | 3.0±0.3 b | 4.2±0.2 bc | 6.8±0.3 ab | 6.0±0.2 c | 7.2±2.3 ab | 5.0±0.0 ab | |
| 150 | 40.5±2.0 a | 3.0±0.2 b | 4.2±0.3 bc | 6.9±0.6 ab | 6.3±0.5 c | 8.6±0.9 a | 7.0±1.0 a | |
[i] Means that have same letters in each column are nonsignificant statistically at p = 0.05 (DMR test); values are means ± standard deviation; capital letters refer to main effects, while lower case letters refer to interactions
Table 3
The effect of planting date and GA3 treatment on corm yield parameters of Freesia hybrida ‘Corona’
| Treatment | Mother corm diameter (mm) | Fresh weight of mother corm (g) | Fresh weight of cormels (g) | No. of cormels per mother corm | |
|---|---|---|---|---|---|
| Planting date | 1st Dec. | 22.2±2.1 A | 7.1±1.2 A | 3.4±0.7 A | 1.7±0.5 A |
| 15th Dec. | 22.5±2.9 A | 7.5±0.8 A | 2.4±0.6 B | 1.8±0.9 A | |
| GA3 (mg·L−1) | 0 | 20.7±2.0 B | 6.5±1.1 B | 3.2±1.0 A | 2.0±1.1 A |
| 75 | 22.5±2.9 AB | 7.4±0.7 AB | 3.0±1.0 A | 2.0±0.4 A | |
| 150 | 23.9±1.4 A | 8.1±0.7 A | 2.6±0.6 A | 1.3±0.5 A | |
| Planting date × GA3 | |||||
| 1st Dec. | 0 | 21.0±2.1 a | 6.7±1.2 b | 3.8±0.7 a | 1.4±0.3 a |
| 75 | 21.5±1.1 a | 7.2±1.0 ab | 3.7±0.9 a | 2.4±0.1 a | |
| 150 | 24.2±1.8 a | 8.6±0.7 a | 2.9±0.5 a | 1.4±0.4 a | |
| 15th Dec. | 0 | 20.3±2.4 a | 6.4±1.2 b | 2.7±1.0 a | 2.6±1.3 a |
| 75 | 23.5±4.2 a | 7.5±0.4 ab | 2.2±0.1 a | 1.6±0.3 a | |
| 150 | 23.6±1.2 a | 7.5±0.1 ab | 2.4±0.7 a | 1.2±0.6 a | |
[i] Means that have same letters in each column are nonsignificant statistically at p = 0.05 (DMR test); values are means ± standard deviation; capital letters refer to main effects, while lower case letters refer to interactions