Hanifeh Seyed Hajizadeh; zohreh Mani; fataneh yari; fahimeh gholizadeh vakilkandi
Abstract
Water imbalance and vascular occlusion are two serious factors in sort lasting of cut gerbera. In order to evaluate the potentials of essential oils as an alternative to chemicals in the protective solution, a factorial experiment has been conducted in a completely randomized design with four replications. ...
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Water imbalance and vascular occlusion are two serious factors in sort lasting of cut gerbera. In order to evaluate the potentials of essential oils as an alternative to chemicals in the protective solution, a factorial experiment has been conducted in a completely randomized design with four replications. The treatments contain 8-hydroxyquinoline sulfate (0, 100 ppm) and thyme and savory essential oils (250, 500 ppm). Preservative solutions include distilled water and 8-HQS, both considered as the controls. Every day in a week, in addition to evaluating flower longevity, physiological parameters, plant water relations, and bactericidal population are measured. Results show that the protective solution with 250ppm of thyme essential oil offer 8.6 days longer vase life than the control. The 500ppm savory displays the best performance to protect the petal membrane stability, compared to both controls (distilled water or 8-HQS) at the end of the experiment. Gerbera petals, treated with thyme essential oil at 250 ppm, are fresher, having higher water content than other treatments, even in comparison with 8-HQS. During longevity, anthocyanin and dry matter have had an increasing trend with the Tss, showing a decreasing trend. The antibacterial properties of the essential oils have been significantly established in respect to the desired results of growth controlling of the microbial population in the preservative solution, even compared to 8-HQS, so it seems that the essential oils are a good alternative for antibacterial chemicals and can even reduce the harmful environmental side-effect of conventional preservative.
Mahdi Sadeghi Raviz; Nourollah Ahmadi; Naser Safaie; Iman Rahmani
Abstract
The effect of methyl jasmonate (MeJA) vapor treatment on antioxidant enzymes activities and vase life of gerbera cut flower was investigated in this experiment. This research was conducted as a split-plot experiment based on completely randomized design with three replications at the laboratory of the ...
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The effect of methyl jasmonate (MeJA) vapor treatment on antioxidant enzymes activities and vase life of gerbera cut flower was investigated in this experiment. This research was conducted as a split-plot experiment based on completely randomized design with three replications at the laboratory of the postharvest physiology, College of Agriculture, Tarbiat Modares University in 2013. Gerbera flowers were harvested at early morning from a commercial greenhouse and cut flower stems were put in a preservative solution containing 200 mg/L 8- hydroxyquinoline sulfate and sucrose 3%, exposed to 0, 0.1, 0.2 and 0.3 µlL−1 MeJA with 20 µlL−1 ethanol and control for 24 h. The results showed that MeJA significantly increased vase life and improved postharvest characteristics of cut gerbera flowers. MeJA 0.2 µlL−1 treatment extended the vase life to 15.67 days, compared to the control and ethanol treatments. Minimum of petal wilting symptoms were revealed in samples treated with MeJA. The lowest malondialdehyde and lipid peroxidation rates were also observed in MeJA treatments that they had a significant difference with ethanol and control. MeJA treatments resulted in increasing antioxidant enzymes activity and protein content compared with ethanol or control.
Asghar Ramezanian; Seyyed Hossein Mirdehghan; Najmeh Roshanzamir
Abstract
In this research the effect of preharvest application of salicylic acid and methyl jasmonate on vase life and some qualitative and quantitative characteristics of cut rose flowers cvs. ‘Sweet Water’ and ‘Dolsevita’ was investigated. Salicylic acid at 0.01, 0.05 and 0.1 mM and ...
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In this research the effect of preharvest application of salicylic acid and methyl jasmonate on vase life and some qualitative and quantitative characteristics of cut rose flowers cvs. ‘Sweet Water’ and ‘Dolsevita’ was investigated. Salicylic acid at 0.01, 0.05 and 0.1 mM and methyl jasmonate at 0.1 and 0.2 mM foliar sprayed and distilled water used as control. This experiment was carried out using CRD with four replications. Harvested flowers kept at 3±1°C and 70-80% RH. Results showed that methyl jasmonate at 0.2 and salicylic acid at 0.1 mM on ‘Sweet Water’ and methyl jasmonate at 0.1 mM on ‘Dolsevita’ increased vase life with delay in senescence related processes through increase in solution uptake, increase in relative fresh weight, maintenance of plant membrane stability and stem total carbohydrate. Also, ‘Sweet Water’ with average of 40.56 days compared with ‘Dolsevita’ with average of 27.74 days increased the vase life. Overall, preharvest spray of roses with methyl jasmonate and salicylic acid as a method to increase postharvest quality and maintenance of cut roses is recommendable.
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.