Abstract

Abstract Alstroemeria is one of the most important cut flowers that has recently been introduced to the world. some materials can help increase longevity of cut flowers. The aim of this research was evaluating the effect of some chemical solutions on postharvest Alstroemeria (cv.stratus) cut flowers. experiment arranged on factorial based on completely randomized design with two factor of sucrose (٠, ٥, ١٠ and ١٥ g/l ) and salicylic acid (٠, ١٠٠, ٢٠٠ and ٤٠٠ mg/l) with three replication. Longevity, leaf yellowing and ethylene production was evaluated. Analysis of variance showed that effect of sucrose on longevity and leaf yellowing traits was not significant but on ethylene production ( except for the first ٣ hours ) had a significant effect. Effect of salicylic acid (SA) on longevity, leaf yellowing and ethylene production (except for the first ١٢ hours) was significant at the one percent level. interactions between sucrose and SA on the longevity, leaf yellowing and ethylene production rate in ٣ hours at the ٥٪ level and on ethylene production rate at ٦, ١٢ and ٢٤ at the one percent level was significant. results showed that ١٥ g/l sucrose plus ٤٠٠ mg/l SA treatment and also ٤٠٠ mg/l SA on increasing longevity and reducing ethylene production had the greatest effect. Treatment cut flower with ٤٠٠ mg/l SA and also ٥ g/l sucrose plus ٤٠٠ mg/l SA greatest effect on reducing leaf yellowing and the control little effect showed. Kaywords: Sucrose, Salicylic acid, Alstroemeria, Longevity, Ethylene