Table I. Phenotypic characteristics of transgenic potato plants expressing either a GA20ox or a GA2ox gene from Arabidopsis.
Parameters were determined from soil-grown plants at harvest. Results are shown for three independent experiments and represent means ± se of 19 to 21 plants. Statistically significant differences from the wild type were determined using one-tailed t tests assuming unequal variance and are indicated by asterisks (P ≤ 0.05).
| Plant | Stem Height | Tuber Yield | No. of Tubers per Plant |
| cm | g plant−1 | ||
| Wild type (Solara) | 55.2 ± 3.0 | 166.3 ± 7.6 | 7.8 ± 0.5 |
| GA20ox | |||
| GA20ox-5 | 102.4 ± 3.5* | 166.6 ± 5.3 | 7.2 ± 0.5 |
| GA20ox-15 | 99.8 ± 3.0* | 135.0 ± 4.9* | 7.0 ± 0.5 |
| GA20ox-58 | 120.4 ± 5.9* | 116.3 ± 9.4* | 4.5 ± 0.3* |
| GA2ox | |||
| GA2ox-27 | 38.2 ± 4.3* | 94.9 ± 6.4* | 3.7 ± 0.3* |
| GA2ox-38 | 35.9 ± 3.5* | 102.0 ± 9.0* | 4.3 ± 4.3* |
| GA2ox-50 | 59.1 ± 4.4 | 80.5 ± 8.3* | 4.1 ± 0.4* |