Fig. 3. PeuLAC2 overexpression improves drought tolerance in poplar.

a Phenotypic comparison of Pal-WT and Pal-OE plants grown in soil under drought conditions (withholding water) for 0 days (as a control) and 10 days. b Statistical analysis of the survival rate in poplar after withholding water for 16 days followed by rewatering for 5 days. c to d Contents of MDA (c) and H₂O₂ (d) in Pal-WT and three Pal-OE plants were measured after 0 and 10 days of drought stress. e The activity of CAT in Pal-WT and three Pal-OE plants measured after 0 or 10 days of drought stress. f The stem water potential in Pal-WT and three Pal-OE plants measured after withholding water for 16 days or providing adequate water for 16 days. Three independent experiments were performed. Statistical analysis was performed with Student’s t-test (*P < 0.05, **P < 0.01); data are provided as means ± SDs. FW, fresh weight