Table 1.
Effects of GA3 application to soybean stems on internode elongation and stem GA3 content.
| Cultivar | Node Position | Internode Length (cm) | GA3 (μg kg−1) | ||||
|---|---|---|---|---|---|---|---|
| CK | V1-GA3 | V3-GA3 | CK | V1-GA3 | V3-GA3 | ||
| HN48 | 1 | 7.20 ± 0.12 b | 7.90 ± 0.09 a | 7.13 ± 0.08 b | 31.25 ± 1.27 c | 34.65 ± 0.35 b | 37.36 ± 0.42 a |
| 2 | 3.62 ± 0.03 b | 9.66 ± 0.57 a | 3.66 ± 0.03 b | 29.26 ± 0.85 c | 35.07 ± 0.61 b | 40.33 ± 1.71 a | |
| 3 | 2.64 ± 0.09 c | 13.46 ± 0.29 a | 4.56 ± 0.44 b | 27.54 ± 1.24 c | 33.75 ± 0.30 b | 37.76 ± 0.14 a | |
| 4 | 4.48 ± 0.11 c | 19.52 ± 0.21 a | 8.40 ± 0.29 b | 24.31 ± 0.55 c | 28.44 ± 0.41 b | 33.57 ± 0.39 a | |
| 5 | 5.18 ± 0.08 c | 10.24 ± 0.20 a | 6.55 ± 0.12 b | - | - | - | |
| HN60 | 1 | 5.15 ± 0.07 b | 6.73 ± 0.12 a | 5.23 ± 0.10 b | 30.22 ± 0.75 c | 33.51 ± 0.18 b | 35.46 ± 0.49 a |
| 2 | 2.66 ± 0.05 b | 8.08 ± 0.18 a | 2.78 ± 0.12 b | 27.34 ± 0.39 c | 34.18 ± 0.47 b | 38.18 ± 0.40 a | |
| 3 | 2.22 ± 0.05 c | 13.18 ± 0.21 a | 3.18 ± 0.02 b | 26.42 ± 0.47 c | 28.78 ± 0.20 b | 30.10 ± 0.39 a | |
| 4 | 2.70 ± 0.04 c | 13.56 ± 0.31 a | 5.72 ± 0.14 b | 23.20 ± 0.50 c | 27.50 ± 0.78 b | 31.89 ± 0.41 a | |
| 5 | 3.20 ± 0.12 c | 9.18 ± 0.13 a | 5.70 ± 0.22 b | - | - | - | |
The values are presented as the means ± standard errors (n = 8). The different letters indicate that the differences between treatments reached a significance level of 5%; the treatments are compared horizontally. V1-GA3: GA3 solution (0.1 g L−1) was applied to the 2nd internode in the V1 phase; V3-GA3: GA3 solution (0.1 g L−1) was applied to the 2nd internode in the V3 phase; CK: control.