Abstract

Abstract Nitric oxide (NO) and thidiazuron (TDZ) have been shown to extend the postharvest life of Many plants. In this article, we have evaluated the effect of sodium nitroprusside (SNP), as nitric oxide donor and thidiazuron (TDZ) on the flower protein changes and enzyme activities during postharvest cut lilium flowers. Flowers were treated for 24-h at 0, 25, 50μmol L-1 TDZ and 0, 25, 50, 75 μmol L-1 SNP and then hold in a 1% sucrose solution. Results showed that the concentration of 50 μmol L-1 TDZ with 50 μmol L-1 SNP had the significant effect on protein of petals. Treatments with 50 μmole L-1 TDZ with 75 μmole L-1 SNP had the greatest effect on catalase and peroxidase enzyme activity of petals. Keywords: cut flower, enzyme activity, Lilium, nitric oxide, protein, thidiazuron.