Effect of foliar application of polyamines on growth properties, vase life and endogenous plant growth regulators contents of cut rose flower (Rosa hybrida cv. Dolcvita)

Improvement of growth and flowering with polyamines application has been reported in different plants. So, in this study application of exogenous polyamines on quantitative characteristics, vase life and endogenous hormones and polyamines contents in rose flower was investigated. For this purpose, an experiment was conducted as randomized complete block design (RCBD) with ten treatments, three replications and two observations in each replication in a hydroponic greenhouse in Yasouj city. Treatments were including foliar application of putricine (Put) at 1, 2 and 3 mM, spermidine (Spd) at 0.5, 1 and 1.5 mM, spermin (Spm) at 1, 2 and 4 mm and control. The highest and the lowest fresh weight and flower height were obtained in the plants treated with Spd 1.5 mM and control, respectively. Foliar application of polyamines increased the vase life, so that maximum vase life (16 days) was observed in treated flowers with Spm 1 mM as compared to the other treatments. The highest content of IAA, GA3 and zeatin obtained in treated flowers with Spm 4 mM. The highest ABA content was found in treated flowers with Spd 1.5 mM. The use of exogenous polyamine increased the internal Put and Spd contents. So, the final results of this study revealed that exogenous application of 1.5 mM Spd and 4 mM Spm due to increasing of internal hormones and PAS, caused to increase of vegetative properties and vase life of rose cv. Dolcvita.