Fig. 3From: Modulation of physiological and biochemical traits of two genotypes of Rosa damascena Mill. by SiO2-NPs under In vitro drought stressThe interactive effect of drought stress × SiO2-NPs on Fm (a) and different levels of SiO2-NPs of two Damask genotypes on Fm (b). Different letters indicate significant differences according to the LSD test at P < 0.05Back to article page