Using of preservative solutions to improve postharvest life of Rosa Hybrid cv. Black magic

Ornamental products such as cut flowers have a limited display life so the effect of some effective chemical holding treatments on the vase life of rose (Rosa hybrida L.) cv. Black magic cut flowers was studied. In order to find the best treatment in extending cut rose flowers vase life, cut roses were kept in preservative solution including 2.5% sucrose supplemented with 8-hydroxyquinoline citrate, copper sulfate, silver nitrate, aluminum sulfate, ethanol and water (control). All treatment flowers were stored in the climate controlled room at 20±2 ◦ C with 90% RH and 12h photo period using fluorescent lamps (light intensity of 15μmol m -2 s -1 ) at the top of corolla .The result showed that ethanol and aluminum sulfate treatments had the most important role in the extending longevity as well as water uptake in these treatments. Also, there was no significant difference between treatments for leaf and petal dry weight, but the partially high level of water content in aluminum sulfate and ethanol treatments can be effective in increasing vase life. The amount of anthocyanin leakage was high in control. Controls vase life ended at day 9, while the vase life of flowers was kept in aluminum sulfate and ethanol were 18 day.