Effect of Dye-absorbing Duration and Environmental Conditions on Quality of Preserved Leaves in Eucalyptus cinerea

Title
Effect of Dye-absorbing Duration and Environmental Conditions on Quality of Preserved Leaves in Eucalyptus cinerea
Author(s)
오욱임영희김소은
Keywords
VASE LIFE; CUT; GLYCEROL; FLOWERS
Issue Date
201406
Publisher
KOREAN SOC HORTICULTURAL SCIENCE
Citation
KOREAN JOURNAL OF HORTICULTURAL SCIENCE & TECHNOLOGY, v.32, no.3, pp.390 - 399
Abstract
The objective of this study was to establish a processing technology for preserved leaves based on the results from the examination of the optimal period and condition for dye-absorbing treatment for Eucalyptus cinerea F. Mull. ex Benth. (silver dollar eucalyptus) being used frequently as plant material for flower design. Cut foliages of H. cinerea with uniformly matured leaves were cut into 20 cm lengths and their lower stem parts were placed in dye solution in growth chambers with different temperatures (10, 20, 30, and 40 degrees C), vapor pressure deficits (VPD; 0.23, 0.70, 1.17, and 1.61 kPa), and photoperiods (0, 6, 12, 24 hours) for 3, 6, 9, and 12 days, and then dried in a room of 20 degrees C for three days. Lower temperature during preserving dye treatment reduced the changes in leaf color compared with fresh leaves and decreased Delta E value. Especially, high temperature increased red degree (a) and decreased yellow degree (b) due to browning. Lower VPD reduced the change in leaf color compared with fresh leaves and decreased Delta E value. Shorter photoperiod reduced the change in leaf color compared with fresh leaves and decreased Delta E value. The Delta E value increased with increasing absorbing duration under three environmental conditions. The flexibility of stem and leaves after dipped into preserving dye solution and dried for 3 days increased with decreasing temperature, VPD and dipping duration. Therefore, the optimal environment condition for dye treatment was 0.23-0.70 kPa VPD at 10-20 degrees C in the darkness, and the optimal and economical duration was 3 days. These conditions reduced the speed of water loss by decreasing transpiration, so yellowing or browning by rapid water loss deteriorated the quality of preserved leaves out of these ranges.
URI
http://hdl.handle.net/YU.REPOSITORY/32052http://dx.doi.org/10.7235/hort.2014.13115
ISSN
1226-8763
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자연자원대학 > 원예생명과학과 > Articles
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