effects of different polyamines on vase life, ethylene production and some physiological traits of carnation (dianthus caryophyllus cv. red corsa)

in this research the effect of potrecine, spermine and spermidine on the postharvest life of cut red carnation (corsa) and some physiological trait was investigated in horticultural lab of azad university. therefore, an experiment based on completely randomized block design with tree levels of putrescine (1, 2 and 3) mm and spermidine (0.5, 1 and 2) and spermine (1, 2 and 3) mm with 3 replications. the recorded traits included vase life and morphological and physiological factors. the results indicated that all of the treatments increased vase life significantly compared to control treatment. on the other hand polyamines decreased ethylene production. spermidine (2 mm) caused the highest vase life and the lowest ethylene production. all of the treatments especially spermidine (2 mm) increased flower diameter and solution uptake content significantly compared to control treatment and spermidine (2mm) have been the most effective treatment. spermidine (1 and 2 mm) were only treatments that increased dry matter percentage significantly in the flowers. spermidine (2 mm) caused the maximum amount of physiological traits as protein, chlorophyll and total soluble solid in the leaves of flowers. therefore spermidine( 2 mm) is suggested as the best treatment to increase postharvest life in carnation cv red corsa.