Azizollah Kheiry; Ahmad Khalighi; Younes Mostofi; Rohangiz Naderi
Volume 13, Issue 1 , August 2011, , Pages 9-20
Abstract
Tuberose is one of the most important floral crops in Iran. Long spikes of fragrant flowers make it excellent for cut flower. Due to the beauty and sweet fragrance of flowers, it used in all seasons for flower arrangements. Production of high quality flowers and vase life extension is important for competition ...
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Tuberose is one of the most important floral crops in Iran. Long spikes of fragrant flowers make it excellent for cut flower. Due to the beauty and sweet fragrance of flowers, it used in all seasons for flower arrangements. Production of high quality flowers and vase life extension is important for competition in world markets. For this reason this research was conducted on Polianthes tuberosa var Double base on factorial experiment in RCB (randomized complete block design) with three replications. Both gibberellic acid (GA3) and benzyl adenine (BA) were sprayed on bulbs and foliage of plants at four concentration levels. Results showed that gibberellic acid and benzyl adenine treatments had significant differences in all of the measured indices at one percent level. Gibberellic acid increased stem and rachis length in some concentrations and also accelerated flower stalk emerge. Benzyl adenine increased stem diameter, floret numbers and vase life and preceded flowering. Both of these plant growth regulators improved water uptake by cut flowers and increased diameter of second floret but decreased ethylene production of the flowers. Essential oils of flowers were extracted by solvent extraction method. Both of the plant growth regulators had negative effects on essential oils of flowers, but in 1000 mg.l-1 of BA essential oils of flowers were higher than other concentrations.
Elham Danaie; Younes Mostofi; Pejman Moradi; Reza Azizi nejad
Volume 13, Issue 1 , August 2011, , Pages 21-29
Abstract
The effect of gibberelic acid (GA3) and ethanol on the postharvest quality and vase life of gerbera cut flowers was investigated. Freshly cut flower stems of gerbera cultivar ‘Good timing’, were put in vases containing zero, 50, 100, 150, 200 or 300 mgL-1 GA3 for 48 hr and then held in vases ...
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The effect of gibberelic acid (GA3) and ethanol on the postharvest quality and vase life of gerbera cut flowers was investigated. Freshly cut flower stems of gerbera cultivar ‘Good timing’, were put in vases containing zero, 50, 100, 150, 200 or 300 mgL-1 GA3 for 48 hr and then held in vases containing 2.5 percent ethanol and three percent sucrose in two methods. In the first method, the vase solutions were not replaced but in the second method, the vase solutions replaced and refreshed when solution uptake was measured. The vase was placed in chambers at 25°C and relative humidity about 70 percent with 14 hr photoperiod that was maintained using fluorescent lamps (light intensity of 15 µmolm-2s-1). Data were recorded for vase life, fresh weight, solution uptake, membrane stability, total soluble solid over time and analyzed statistically. Results revealed that GA3 with 50 mgL-1 was the most effective treatments for vase life, fresh weight, solution uptake, membrane stability and total soluble solid of gerbera cut flowers. Also results show that application of ethanol in second method (refreshing) was better than application in the first method as constant vase solution.