Table 1.
Effects of paclobutrazol (PBZ) on plant height, plant fresh weight and soil water content in Curcuma alismatifolia Gagnep. cv. Chiang Mai Pink during 0–30 days of water being withheld.
| Treatment | Withholding water |
||||
|---|---|---|---|---|---|
| 0 day | 10 days | 20 days | 30 days | ||
| Plant height (cm) | Well-watered | 32.5 ± 1.7a | 48.5 ± 1.3a | 72.9 ± 2.2a | 80.3 ± 3.9a |
| No water | 36.7 ± 2.7a | 41.2 ± 0.6b | 41.4 ± 1.8b | 66.0 ± 2.0b | |
| Well-watered + 1500 ppm PBZ | 16.6 ± 0.7b | 18.2 ± 0.9c | 18.7 ± 1.2c | 28.8 ± 3.6c | |
| No water + 1500 ppm PBZ | 17.1 ± 2.3b | 18.9 ± 3.7c | 22.5 ± 2.2c | 23.5 ± 0.9c | |
| F-test | ∗ | ∗ | ∗ | ∗ | |
| Plant fresh weight (g) | Well-watered | 5.8 ± 0.6a | 14.6 ± 1.2a | 34.8 ± 10.2a | 75.7 ± 20.4a |
| No water | 5.1 ± 0.1a | 9.9 ± 1.1b | 7.9 ± 1.8b | 17.6 ± 2.9b | |
| Well-watered + 1500 ppm PBZ | 2.9 ± 0.7b | 4.2 ± 0.5c | 6.3 ± 1.8b | 8.7 ± 1.1c | |
| No water + 1500 ppm PBZ | 3.5 ± 0.5b | 3.9 ± 0.7c | 7.7 ± 1.6b | 8.5 ± 1.8c | |
| F-test | ∗ | ∗ | ∗ | ∗ | |
| Soil water content (%) | Well-watered | 27.6 ± 1.4 | 27.7 ± 3.0a | 30.0 ± 1.4a | 30.3 ± 1.1a |
| No water | 26.7 ± 3.1 | 12.8 ± 2.1b | 5.0 ± 1.5b | 3.3 ± 1.1b | |
| Well-watered + 1500 ppm PBZ | 28.0 ± 2.6 | 30.1 ± 2.7a | 30.8 ± 1.1a | 30.6 ± 1.9a | |
| No water + 1500 ppm PBZ | 27.7 ± 1.4 | 17.9 ± 0.6b | 6.3 ± 1.9b | 4.8 ± 0.6b | |
| F-test | ns | ∗ | ∗ | ∗ | |
The data are expressed as the means of three replications ± standard deviation (SD). F-test, ns: no significant difference; ∗: significant difference at p < 0.05. Mean sharing with different letters in a single column of the same parameter is considered significantly different by the least significance difference (LSD) test.