Effect of used different concentration of methyl jasmonate on postharvest qualitative, quantitative traits and vase life of spray Dianthus(Dianthus caryophyllus) cv. tessino

Carnation flower is considered one of the most important flowers due to its area under plantation and production of cut flowers. Since its vase life, under ideal conditions of preservation, is less than 10 days, from perspectives of consumers, sellers and exporters, increasing long life of flower seems to be necessary. Nowadays lots of research have been made on the effects of plant growth regulators on improvement of production, and reduction of plant wastes after flower harvest. This research was accomplished with the objective of studying the effect of different concentrations of methyl jasmonate on quantitative and qualitative features and also vase-life of postharvest miniature carnation cut flowers. The research utilized 200, 100, 50, 25 ppm levels of methyl jasmonate and sucrose 3% in three repetitions; each repetition including 5 branches and totally six treatments. The studied attributes included flowering percentage, durability, solution attraction, relative wet weight, relative water content, cell membrane stability index, total leaf chlorophyll, petal antocyanin, and superoxide dismutase (SOD) enzyme activity. Data mean comparison was made by Duncan multiple range test. The results of research explained significant difference in the measured attributes under the influence of methyl jasmonate 25 ppm compared to other treatments; also, in 200 and 25 ppm concentration a significant difference was observed. According to the obtained results, utilizing higher concentrations of methyl jasmonate is not suggested due to lower durability and long life of this flower.