This experiment was conducted to evaluate the effect of short-term treatment of silver nanoparticles at concentrations of 0, 4, 25, 75 and 125 mg/L on flowers of cut rose cultivar 'High and Magic' following storage in sucrose solution at concentrations of 0, 2 and 3% in terms of vase life and some physiological traits after harvest. This research was conducted as a factorial experiment in a completely randomized design with three replications for each treatment. The experiment was conducted under conditions of temperature of 2 ± 23°C, relative humidity of 5 ± 60% and ambient light intensity of 12 μmol/m2/s for 12 hours using fluorescent lamps. The results showed that the treatment of 125 mg/L of silver nanoparticles with 2% sucrose and without sucrose had the greatest effect in controlling stem end bacteria. Short-term treatment of silver nanoparticles at all concentrations improved solution absorption, maintenance of relative humidity of the branch, improved flower opening and leaf chlorophyll fluorescence index (Fv/Fm) compared to the control treatment. The highest rate of flower opening with the largest flower size was observed in the treatment of 75 mg/L of nanoparticles with 2% sucrose on the ninth day of vase life. The lowest vase life was in the treatments of distilled water alone and with sucrose. The highest vase life was observed in the treatments of 75 and 125 mg/L of silver nanoparticles without sucrose and with sucrose compared to other treatments.
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