Fig. 5From: Evaluation of nano-silicon efficiency on compatible solutes and nutrient status of Damask rose affected by in vitro simulated drought stressInteraction between drought stress × SiO2-NPs on leaf PPO activity a, drought stress × two Damask genotypes on PPO activity b, and SiO2-NPs × two Damask genotypes on PPO activity c. Different letters indicate significant differences according to the LSD test at P < 0.05Back to article page