Figure 6.
Physiological traits of transgenic potato plants overexpressing StMYB1R-1 under drought-stress conditions. A, Survival rates of transgenic potato plants overexpressing StMYB1R-1 under drought-stress conditions. Eight-week-old T0 plantlets were deprived of water for 15 d, watering was resumed for 7 d, and then the plants were scored for viability. Plants were considered dead if all the leaves were brown and there was no growth after 7 d of watering. n = 3 independent experiments (20 plants per experiment). B, Fresh weight of leaves from transgenic potato plants overexpressing StMYB1R-1 under drought-stress conditions. Detached leaves from transgenic and wild-type potato plants were measured. n = 3 independent experiments (20 detached leaves per data point). C, The kinetics of water loss in detached leaves from wild-type and transgenic potato plants overexpressing StMYB1R-1. Water loss is presented as the percentage of weight loss versus initial fresh weight. Values represent the means ± se of three independent experiments. [See online article for color version of this figure.]