Abstract
The effect of selected chemical agents used as preservative solutions to improve the keeping quality of cut snapdragon ( Antirrhinum majus L. cv. Yellow Butterfly) flowers had been studied. These preservative solutions (treatments) were: 2% sucrose, 200 ppm 8-hydroxyquinoline sulfate (8-HQS), pulsing treatment with 200 ppm 8-HQS in combination with 2% sucrose for 12 h, pulsing the spikes with 0.2 mM silver thiosulfate (STS) for 1 h, pulsing with 0.2 mM STS for 1 h followed by 2% sucrose solution, or distilled water used as control. The results showed that all treatments had improved the keeping quality and vase life of the cut flowers comparing to control ones. Among all these treatments, the 8-HQS plus 2% sucrose treatment showed best water uptake, water balance, percentage of maximum increase in fresh weight of the cut flower stem and vase life which was extended up to 18 days. Moreover, this keeping solution treatment retarded the degradation of chlorophyll as well as carbohydrate of the cut flowers during their postharvest life. It has been concluded that 200 ppm 8-HQS combined with 2% sucrose solution has the potential to be used as a commercial cut flower preservative solution to delay flower senescence, enhance post-harvest quality and prolong the vase life of cut snapdragon flowers.
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