Effect of short time treatment of salicylic acid in delaying flowers senescence in cut rose (Rosa hybrida) cv. Yellow Island

In this study، effect of salicylic acid on delaying senescence in rose flowers was investigated. Rose flowers cv. Yellow Island was pre-treated with different concentrations of salicylic acid (SA) during 18 hours. The greatest delay in senescence was obtained with 150 mg L-1 SA، as compared to control was increased nearly twice. Application of 150 mg L-1 SA caused to retard degradation of protein over 8 days vase life. SA suppressed increasing proline up to 4 days، thereafter، its content in SA- treaded and control was the same. Moreover، 150 mg L-1 SA retarded lipid peroxidation and delayed flowers senescence. The results suggested that SA as a preservative solution resulted to stabilize membrane and maintain protein content، delay senescence in cut rose flowers.