Effects of Different Preservating Solutions on the Vase Life of Cut Tuberose (Polianthes tuberosa L.)Flowers at Usual Home Conditions
2003
Jowkar, Mohammad Mahdi, Department of Horticulture, College of Agriculture , Azad University , Jahrom. | Salehi, Hasan, Department of Horticulture, College of Agriculture , Shiraz University
Tuberose is one of the tropical and subtropical bulbous cut flowers cultivated extensively in most floricultural regions of Iran . Due to its delicate fragrance, Iranians use it in all seasons for flower arranging. Although tuberose has a high potential for a long vase life after harvesting, it declines rapidly at home. In order to overcome this problem an experiment was conducted in a completely randomized design in two sections. To find a suitable preservative which provides the longest vase life for tuberose, the experiment was carried out by applying the carelessness of most consumers: neither recutting stem ends nor changing the vase solutions. In the first section the preservative solutions were: sucrose (1,2 and 3%), silverthiosulphate (0.4, 0.8 and 1.2 mM), silver nitrate (50,100 and 150 mg/l), citric acid (150,300 and 450 mg/l) and tap water as the control. In the early days of the experiment, silverthiosulphate caused severe burning of the florets; silver nitrate caused the wilting of the florets and bent the end of the flower spikes; and sucrose didn’t have any useful effect, it decreased the vase life. The longest vase life belonged to citric acid, after which the control (tap water) was placed. The second section of the experiment was conducted for determining the role of the water quality. In this part the treatments were: sterile distil water, citric acid made with sterile distil water (150,300 and 450 mg/l) and tap water as the control. The longest and the shortest vase life belonged to sterile distil water and the control (tap water) respectively. The citric acid prepared with sterile distil water had a desirable effect on the vase life of cut tuberose flowers. This effect increased with the increment of the acid up to 450 mg/l.
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