Effect of Gibberelic acid, Salicylic acid and Benzyl adenine in pre and post harvest stage on some physiological, enzymatic traits and vase life of Gerbera (Gerbera jamesonii) cut flower Sorbet'

This research for evaluated the effect of Gibberelic acid, Salicylic acid Benzyl adenine in pre and postharvest stage on some physicochemical and enzymes traits and vase life of Gerbera jamesonii is one of the most popular cut flowers that its production has increased in global markets and Iran for enhance the quality, shelf life and minimize postharvest losses in cut flower, done. For this purpose, an experiment based on completely randomized design with 8 treatments and 3 replications on cut flower gerbera 'Sorbet' were performed. In the first experiment, pulse treatment (24 hours), BA, GA3 and SA in 2 levels (50, 100ppm) and preservative solution of silver nano particles 3 ppm with 3% sucrose was used. Sliver nano particles3 ppm with 3% sucrose and distillated water were used as control. In the second experiment, spraying before harvest, BA, GA3 and SA in 2 levels (25, 50 ppm) was performed and then cut flowers transferred to preservative solution of silver nano particles 3 ppm with 3% sucrose. Sliver nano particles 3 ppm with 3% sucrose and distillated water were used as control. During experiment traits including vase life, relative fresh weight, and cell membrane stability index, anthocyanins of petals, phenylalanine ammonia lyase and super oxide dismutase enzymes activity was investigated. The results showed that in both experiments there were significant differences between the treatment and control, among of concentrations of BA, GA3 and SA, in the first experiment, SA 100 ppm and in the second experiment, salicylic acid 50 ppm and then preservative solution containing silver nano particles with sucrose, have the most favorable effect on quantitative and qualitative, enzymatic traits and vase life compared to other treatment. Correlations between traits in both experiments also indicate a significant positive correlation at 1% among vase life of gerbera cut flowers with all traits.