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| Fresh-keeping Effects of Different Concentrations of Alum on Cut Carnation Flowers |
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| DOI：10.16768/j.issn.1004-874X.2020.04.007 |
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| Abstract: |
| The study was to explore the effects of different concentrations of alum on the preservation of cut carnation flowers and provide references for the development of preservatives for carnation.【Method】With pink carnations as tested materials and 3% sucrose + 200 mg/L citric acid + 200 mg/L 8-HQS as the basic liquid（CK）, different concentrations of alum were added to the basic liquid to conduct a vase holding test to study the vase life, fresh weight change rates and other physiological and biochemical changes of carnation cut flowers.【Result】Treatments with different concentrations of alum could extend the vase life of carnations. Among all treatments, the effect of basic liquid+180 mg/L alum was the best. Compared with the CK, the vase life was extended by 3.5 days. During the vase holding process, the fresh weight change rate of cut flowers remained at a high level after 6 days. On the 4th day, the water balance value was less than 0, which appeared 1 day later than that of CK, and had better water absorption and retention capacity. The soluble sugar content was higher than that of CK, which could increase the concentration of cell fluid. After treatment for 3 days, the activities of POD and CAT were higher than those of CK, which effectively scavenged the active oxygen free radicals After treatment for 6 days, the relative conductivity and MDA content of petals of cut carnation flowers were lower than those of CK, which were conducive to maintaining the membrane integrity, strengthening the stress resistance and delaying the aging of the petals.【Conclusion】Basic liquid+180 mg/L alum could effectively extend the vase life of the carnation, improve the water status of cut carnation flowers increase the enzyme activity to remove more free radicals, reduce the relative conductivity and MDA content, protect the integrity of the cell membrane, increase the content of soluble sugar, regulate the osmotic pressure of cells and delay aging to prolong the preservation period of cut carnation flowers. |
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