Table 4.
Fresh and dry weight of potato of the non-transgenic control (CK) and the transgenic plants with high and very high expression of StPIP1 gene under no-stress, moderate-and severe drought stress.
| Weight (g) | Groupa | Non-stress | Moderate drought | Severe drought |
|---|---|---|---|---|
| Root fresh weight | CK | 18.2 ± 0.7abb | 5.9 ± 1.1c | 5.5 ± 2.1c |
| High | 25.4 ± 1.7a | 18.5 ± 1.3ab | 13.6 ± 1.9bc | |
| Very High | 20.8 ± 1.4ab | 24.5 ± 2.5a | 15.0 ± 1.6b | |
| Root dry weight | CK | 2.5 ± 0.2bc | 1.5 ± 0.3c | 0.5 ± 0.0c |
| High | 3.3 ± 0.2b | 2.7 ± 0.4b | 2.1 ± 0.2bc | |
| Very High | 2.9 ± 0.3b | 4.5 ± 0.2a | 2.5 ± 0.1bc | |
| Shoot fresh weight | CK | 187.0 ± 3.5bc | 150.7 ± 4.0c | 32.7 ± 4.3d |
| High | 239.8 ± 22.8bc | 289.0 ± 33.2ab | 160.9 ± 15.9c | |
| Very High | 246.8 ± 18.9b | 340.2 ± 2.2a | 207.0 ± 8.9bc | |
| Shoot dry weight | CK | 44.7 ± 1.5bc | 32.2 ± 1.6c | 16.6 ± 2.2c |
| High | 72.1 ± 0.3a | 72.0 ± 3.7a | 40.9 ± 2.5bc | |
| Very High | 67.8 ± 3.9ab | 73.3 ± 7.7a | 51.8 ± 4.2b |
a
CK is the “Shepody” non-transgenic potato cultivar, the rest are transgenic potato lines with “High” (T1 and T5) and “Very high” (T6 and T7) degree of tolerance.
b
Significant differences among means in each column according to Tukey's HSD test at P < 0.05 (n = 9, i.e., 3 replicates × 3 runs of the experiment).