POSTHARVEST STUDIES ON CUT ROSE FLOWERS (Rosa hybrida, L. cv. First Red). 2-EFFECT OF SOME PRESERVATIVE SOLUTIONS ON FLOWER QUALITY, PHYSIOLOGICAL CHARACATERISTICS AND CHEMICAL COMPOSITIONS OF STORED CUT FLOWERS | ||||
| Journal of Productivity and Development | ||||
| Article 16, Volume 12, Issue 2, July 2007, Page 575-593 PDF (267.87 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpd.2007.45033 | ||||
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| Authors | ||||
| El Sadei Badawy* ; Mohamed Hussein; Nermeen Taha Shanan | ||||
| Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, Giza, Egypt. | ||||
| Abstract | ||||
| This study was carried out at the Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, during the two successive seasons of 2005 and 2006 with the aim of investigating the effect of preservative solutions and holding periods on the longevity, physiological characteristics and chemical composition of rose flowers (Rosa hybrida, L. cv. First Red) stored for 14 days at 2° C. Rose flowers were pulsed in a solution containing kinetin at a concentration of 25 ppm + 8-Hydroxyquinoline at 150 ppm for 24 hours before storing for 14 days at 2º C and a relative humidity (RH) of 85- 90%. After that, the flowers were placed in jars containing one of the following preservative solutions: (1) distilled water, (2) 2% sucrose (Suc) + 200 ppm 8-hydroxyquinoline (8-HQ) + 250 ppm citric acid (CA), (3) 2% Suc+ 200 ppm 8-HQ + 250 ppm CA + 2 mM 2-mercaptoethanol, (4) 2% Suc + 200 ppm 8-HQ + 250 ppm CA + 0.1% Ca(NO3)2 , (5) 2% Suc + 200 ppm 8-HQ, (6) 2% Suc + 200 ppm 8-HQ + 100 ppm CuSO4 or (7) 2% Suc + 200 ppm 8- HQ + 1 mM boric acid. The results showed that the rate of increase in the flower diameter was decreased steadily with time, also fresh weight of flowers and the rate of daily absorption of the preservative solution were decreased after the 3rd day of holding the flowers in the preservative solutions, while the respiration rate was decreased after the 6th day. On the contrary peroxidase activity in the necks of flowers and stem bases were higher on the 12th day than on the 6th day. The total soluble sugars in the petals and leaves, the anthocyanins and carotenoids in the petals, as well as the total chlorophylls and carotenoids in the leaves, were lower on the 12th day than on the 6th day of holding the flowers in the preservative solutions, whereas the total soluble phenols content in the petals and leaves were higher on the 12th day than on the 6th day. Most of the tested preservative solutions increased the flower quality and improved physiological characteristics and chemical composition, compared to distilled water (the control). The preservative solution containing 2% Suc + 200 ppm 8-HQ +2 mM 2- mercaptoethanol + 250 ppm CA can be recommended for holding Rosa hybrida cv. First Red flowers after storage for 14 days on 2° C, as it gave the best results in terms of flower quality, physiological characteristics and chemical compositions, whereas using the preservative solution containing 2% Suc + 200 ppm 8-HQ + 100 ppm CuSO4 resulted in the lowest quality, as well as unacceptable physiological characteristics and chemical compositions. | ||||
| Keywords | ||||
| Rosa hybrida; preservative solution; holding period; sucrose%; 8-hydroxyquinoline; 8-HQ; 2-mercaptoethanol; Citric acid; Ca(NO3)2; CuSO4; Boric acid | ||||
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