Abstract
Tuberose (Polianthes tuberosa L.), is one of the most famous cut flowers used due to its delicate fragrance and commercial demand, nevertheless, the vase life of the inflorescence declines rapidly at home. To overcome this problem an experiment was conducted to find a suitable pre-harvest foliar application which provides the longest vase life of tuberose. Three foliar applications were used in the form of malic acid, citric acid and tryptophan after planting the bulbs with concentrations of (0, 100, 200 and 300 mg/L) for each chemical. Cut inflorescences were then placed into a standard vase solution containing 4% sucrose and 200 mg/L of salicylic acid. Results showed that malic acid at the concentration of (300 mg/L), significantly affected all the vegetative parameters tested with the highest vase life 12.00 and 12.33 days compared with the control (8.33 and 7.66 days). Malic acid also gave the highest total chlorophyll and carbohydrates in the inflorescences of tuberose as compared with the control.
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