Effects of Plant Growth Regulators on Quality, Quantity and Vase-life of Rose flower (Rosa hybrida cv. Avalanche)

Abstract

An experiment was conducted to find the appropriate material for increasing the quantitative and qualitative traits in the pre, and postharvest vase-life of the cut rose flower cv. “Avalanche” in a hydroponic greenhouse based on a randomized complete block design (RCBD) with 16 treatments and 3 replications. Treatments included gibberellic acid at four levels (0, 100, 200, and 300 ppm) and salicylic acid at four levels (0, 100, 150, and 200 ppm). The foliar application was carried out before harvest in tree time at intervals of 10 days. The results showed that the treatments had a significant effect on qualitative, quantitative, and vase life. The highest stem diameter (6.08 mm), flower length (55.90 mm), and the number of branches per plant (6.53 branches per plant) was obtained from T₄ (300 ppm gibberellic acid). The highest vase life (7 days) was recorded in T₅ (150 ppm salicylic acid), with more water absorption and a higher relative fresh weight. T₃ (200 ppm gibberellic acid) had a maximum flower diameter (36.33 mm), and T₁₆ (200 ppm salicylic acid + 300 ppm gibberellic acid) had the longest stem length (74.37 cm). The desired growth regulators in different concentrations were able to increase the quantitative, qualitative, and vase life of the rose flower.