Effect of Humic Acid and silver nanoparticles Treatments on Extending Vase Life of Cut Polianthes Tuberosa L. cv Single Flowers

Tuberose flower (Polianthes tuberosa L.) is an important commercial cut flower in the world, however the short vase life is one of its major problems. So, an experiment was carried out by using five different levels of humic acid (HA) mixed with sucrose and seven different levels of silver nanoparticles (SNP) mixed with sucrose in vase solution on tuberose cut flowers cv." Single". The results indicated that there were significant differences between treatments. The decline of fresh weight in flowers treated with 25, 50 and 75 mg L-1 HA was fewer compared to other levels. Also, the effect of HA on vase life and water uptake index was significantly higher in 25 mg L-1 HA (2.25 days more than control). SNP treatments increased the water uptake, fresh weight, total protein and declined lipid peroxidation amount compared to the control flowers. The results also showed that flowers which were treated with 1 mg L-1 SNP had 2.87 days vase life more than the control flowers. To sum up it can be demonstrated that suitable levels of HA and SNP improved better morphological and physiological properties and eventually increases the vase life of cut tuberose flowers.