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Research Journal of Environmental Sciences
Year: 2015  |  Volume: 9  |  Issue: 4  |  Page No.: 178 - 185

Development of Longevity of Allamanda Flower as Affected by Gibberellic Acid and Aluminium Salt

A.B.M. Sharif Hossain    

Abstract: Allamanda is an ornamental plant cultivated for their large, yellow and pink colorful flowers in the garden, office and home stead as well as in the occasional place. It makes attractive to the environmental beautification for its color and fragrant. The study was conducted with yellow type of Allamanda flower (Allamanda cathartica) to investigate the effects of gibberellic acid (GA3) and aluminium salt (aluminium sulfate) on the longevity (vase life and senescence) of the flower. Three types of treatments were used water control, gibberellin (GA3) 100 ppm and aluminium sulfate 150 ppm. Gibberellic acid (GA3) and aluminium sulfate were swabbed the bud twice a week for 2 weeks. The fresh weight was higher in the aluminium sulfate 150 ppm than gibberellin (GA3) 100 ppm and control. The decreasing trend of fresh weight was found in the case of all treated flowers. The lowest fresh weight loss was found in the aluminium sulfate 150 ppm then gibberellin (GA3) 100 ppm. Flowers treated with aluminum sulfate (8.19%) absorbed more water than those in GA3 and water control treated flower. Water uptake percentage was the highest in the aluminum sulfate treated flower followed by GA3 and water control treated flower. Senescence was delayed 5 days for aluminium sulfate 150 ppm and 1day for gibberellin (GA3) 100 ppm compared to control flower. Compare to control flower, the vase life of both aluminum and gibberellin treated-flowers were much longer (8.5 and 5.5 days) than control (4 days). The results showed that the best treatment for vase life and delay senescence was Aluminium sulphate 150 ppm and then gibberellin (GA3) 150 ppm.

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