Effects of Sugars and Plant Growth Regulators on the Post-Storage Performance of Lycoris aurea Herb. Cut Flowers.
Date Issued
2008
Date
2008
Author(s)
Lin, Wan-Ying
Abstract
Abstract Golden spider lily (Lycoris aurea Herb.) is a flowering bulb native to Taiwan. The storage under low tempwrature usually cause the floret can’t turn yellow or unopen, and this is become a limit factor during export. In order to improve the quality of golden spider lily cut flower after storage, we did some experiment include: 1. Variation of respiration and ethylene under different temperature. 2. Pulsing with glucose and sucrose or spray with different plant growth regulators. 3. Analyzing the sugar content of the stem and different stage of floret during vase period. The respiration is rising with temperature increasing. When cut flowers were stored at low temperature, which could reduce the respiration. No matter cut flowers were stored at any temperature, the production of ethylene is always very low. Respiration is rising with flower opening when cut flowers were stored at 0℃ for 10 days, but stored at 5℃ were not. Although the production of ethylene is also extremely low when cut flowers were stored at low temperature for 10 days, there was a higher peak at 6 days in vase, it may had relation with senescence of cut flowers. 1.5% gucose and 1%, 1.5%, and 2% sucrose pulsing can reduce the percentage of abnormal floret to 8-14 %. Sugar pulsing can increase the water uptake of stem and sucrose is more efficient than glucose. There is no significant different on vase life of cut flowers. Glucose and fructose content of stem is decreasing with vase period, and sucrose content is increasing. But when cut flowers were stored at 5℃ for 10 days, sucrose content is increasing during vase period. The result may because the activity of glucose and fructose inverse to sucrose is affected by low temperature. There are more glucose and fructose content in buds which is more mature, especially glucose. The abnormal florets have higher content of sucrose and lower content of glucose compared with normal florets. Glucose content of abnormal floret at ‘stage 3’ was 6-fold compared with normal floret, and sucrose content was 3-fold. Thus it has some correlation between abnomal floret and sugar content itself. Cut flower treatment with 20, 50, 100, 200ppm BA or GA mixed 100 ppm DCIA spray treatment can increase the flower opening up to 92%, especially with 200 mg l-1 BA and 200mg l-1 GA spray. 200 mg l-1 GA spray also can reduce the percentage of abnormal flowers to 36.36%. 100 mg l-1 BA spray and 200 mg l-1 GA spray can increase the fresh weight of flower, and 200 mg l-1 GA spray can increasing the percentage of fully opening flowers in vase. BA and GA treatment also can enlarge the size of flower, but it is no significant efficient on vase life. However, 75, 100, 125ppm BA or GA spray treatment without DCIA is no benefit to flower opening, abnormal and vase life. ABA spray can reduce the fresh weight of flower, but it is no deleterious on the percentage of flower opening and abnormal. 100 ppm Ethephon spray can reduce the flower opening and increase the percentage of stem which decayed, there is about 70% after Ethephon treatment.
Subjects
Lycoris aurea Herb. cut flowers
sugars
plant growth regulators
Type
thesis
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