Table 1.
The effect of gibberellin A3 (GA3) on lateral root density
| Treatment | Primary root length (cm) | Lateral root number | Lateral root density (cm−1) |
|---|---|---|---|
| P76, WW | 25.9 ± 2.6 | 20 ± 5 | 0.86 ± 0.2 |
| P76, WW (+GA3) | 25.5 ± 2.8 | 24 ± 4 | 0.96 ± 0.1 |
| P76, LW | 18.8 ± 2.2* | 10 ± 3* | 0.53 ± 0.1* |
| P76, LW (+GA3) | 23.9 ± 2.2† | 23 ± 3† | 0.96 ± 0.1† |
| TL, WW | 26.6 ± 2.3 | 23 ± 4 | 0.86 ± 0.1 |
| TL, WW (+GA3) | 27.2 ± 2.2 | 24 ± 5 | 0.89 ± 0.2 |
| TL, LW | 27.3 ± 2.7 | 28 ± 4 | 1.01 ± 0.1 |
| TL, LW (+GA3) | 26.4 ± 2.4 | 38 ± 4† | 1.44 ± 0.1† |
GA, gibberellic acid; TL, translocation line.
*
Significant difference between water‐watered (WW) and limited‐water (LW) treatments for a given genotype and GA treatment (P < 0.05).
†
Significant difference between untreated control and GA3 within genotype and water treatment at P < 0.05 (mean ± SD; n = 30). Number of replicates = 3. The later root number and density were measured on primary root.