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

Lim Young Hee; Kim  So Eun; Oh Wook

doi:10.7235/hort.2014.13115

All Issue

2014 Vol.32, Issue 3 Preview Page Next Page

Effect of Dye-absorbing Duration and Environmental Conditions on Quality of Preserved Leaves in Eucalyptus cinerea 염료 흡수기간 및 환경조건이 유칼립투스의 보존엽 품질에 미치는 영향

30 June 2014. pp. 390-399

PDF XML

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 E. 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°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°C for three days. Lower temperature during preserving dye treatment reduced the changes in leaf color compared with fresh leaves and decreased ΔE 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 ΔE value. Shorter photoperiod reduced the change in leaf color compared with fresh leaves and decreased ΔE value. The ΔE 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°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.

Keywords

cut foliage processing

photoperiod

temperature

transpiration

vapor pressure deficit

본 연구는 절엽의 보존엽 가공기술을 개발하기 위해서 화훼장식용으로 많이 사용하는 유칼립투스(Eucalyptus cinerea F. Mull. ex Benth.)의 보존엽 제작을 위한 보존염료 처리 시 온도, 증기압차(VPD), 광주기 등 환경조건과 침지처리기간이 엽색에 미치는 영향을 구명하고자 수행되었다. 균일한 성숙도의 잎을 가진 유칼립투스 절엽(줄기 포함)을 20cm로 절취한 후 온도(10, 20, 30, 40°C), VPD(0.23, 0.70, 1.16, and 1.61kPa), 광주기(0, 6, 12, 24 h)가 다른 생장상에서 보존염료에 3, 6, 9, 12일간 줄기 하단부를 침지하여 흡수시켰고, 이후 20°C의 실험실에서 3일간 건조시켰다. 그 결과, 보존염료 처리 시 온도가 낮을수록 신선엽과 비교하여 엽색의 차이가 줄어들어 ΔE값이 감소하였다. 특히 고온구에서 갈변현상에 의해 적색도(a)의 증가와 황색도(b)의 감소가 나타났다. VPD는 낮을수록 대조구와의 엽색 차이가 적어 ΔE값이 감소하였다. 광주기는 짧을수록 엽색의 변화가 적어 ΔE값이 감소하였다. 또한 환경조건에 관계없이 흡수기간이 길어질수록 엽색의 변화가 커져 ΔE값이 증가하였다. 보존염료 흡수 후 건조 3일째 줄기와 잎의 유연성은 온도, VPD 및 침지기간이 감소할수록 증가하였다. 따라서, 보존염료 흡수 시 10-20°C의 암 상태에서 0.23-0.70kPa VPD가 최적 환경조건이라 판단되며, 보존염료 처리기간은 보존엽의 품질 및 경제성 면에서 3일이 적당하다고 판단되었다. 이들 환경조건의 공통점은 증산에 의한 수분 손실 속도를 줄인다는 것으로, 이 범위를 많이 벗어나면 급격한 수분 손실에 의해 황변이나 갈변으로 품질이 떨어지게 된다.

키워드

절엽 가공

광주기

온도

증산

증기압차

References

Armitage, A.M. and J.M. Laushman. 1993. Specialty cut flowers: The production of annuals, perennials, bulbs, and woody plants for fresh and dried cut flowers. 2nd ed. Timber Press, Inc. Portland, Oregon, USA. p. 30-33.

Byun, M.S., S.H. Lee, and K.W. Kim. 2009. Prolonging vase life of cut flowers using loess and charcoal in holding solution. Kor. J. Hort. Sci. Technol. 27:110-115.

Byun, M.S., J.Y. Park, and K.W. Kim. 2003. Preservation of the green color and flexibility by glycerination and artificial pigment in dried leaves of Hedera and Camellia. Kor. J. Hort. Sci. Technol. 21:417-421.

Campbell, S.J., J.J. Ogle, and D.C. Joyce. 2000. Glycerol uptake preserves cut juvenile foliage of Eucalyptus cinerea. Austr. J. Expt. Agric. 40:483-492.

De Stigter, H.C.M. 1980. Water balance of cut and intact ‘Sonia’ rose plants. J. Plant Physiol. 99:131-140.

Dubois, P. and D. Joyce. 1992. Preservation of fresh cut ornamental plant material with glycerol. Postharvest Biol. Technol. 2:145-153.

Hillier, M. and C. Hilton. 1986. The book of dried of dried flowers. Simon and Schuster, New York. p.174.

Hunter, N.T. 2000. The art of floral design. 2nd ed. Delmar, Albany, NY, USA. p. 278-279.

Kim, K.W. 1994. Postharvest handling and storage of cut flower, florist greens, and potted plant. SangKyung Book Co., Seoul, Korea.

Knud Nielsen Co. 1994. Dried materials. Knud Nielsen Co., Inc., USA. p. 30-35.

Koyama, Y. and A. Uda. 1994. Effect of temperature, light intensity and sucrose concentration on bud forcing and carnation flower quality. J. Japan. Soc. Hort. Sci. 63:203-209.

Lee, H.J., M.S. Byun, and K.W. Kim. 2003. Retardation of yellowing and abscission by benzyladenine spray treatment in cut leaves of Asparagus. J. Kor. Soc. Hort. Sci. 44:238-244.

Lee, J.H. and Y.K. Nam. 2005. Preservation of detached leaves and whole parts of Nephrolepis ordifolia ‘Duffii’ with glycerol and artificial dyestuff. Kor. J. Hort. Sci. Technol. 23:319-323.

Lee, J.S., P.O. Lee, and E.S. Song. 1990. Effects of inhibitors of ethylene synthesis and action on ethylene production and flower longevity of carnations. J. Kor. Soc. Hort. Sci. 31:284-293.

Lim, Y.H. and W. Oh. 2011. Effects of earthenware vase on longevity of cut gerbera flowers and microbial multiplication in holding solution. Kor. J. Hort. Sci. Technol. 29:110-115.

Lim, Y.H. and W. Oh. 2012. Effect of the treatment methods of ethanol and glycerine on preserved flower quality of carnation ‘Desio’. J. Agr. Life Sci. 46(5):37-45.

Nokes, S.E. 1995. Evapotranspiration, p. 91-132. In: A.D. Ward and W.J. Elliot (eds.). Environmental hydrology. CRC Press LLC, Boca Raton, Florida, USA.

Paparozzi, E.T. and D.E. Mc Callister. 1988. Glycerol in microwave preservation of annual statice (Limonium sinuatum Mill.). Sci. Hort. 34:293-299.

Park, Y.J., J.S. Ahn, H.A. Kim, B.G. Heo, and H.J. Kim. 2009. Effect of ethanol and glycerine treatment at preserved flower processing of rose ‘Vital’. J. Kor. Soc. People Plants Environ. 12(4):75-82.

Park, Y.J., B.G. Heo, and Y.K. Kang. 2001. The present situation and prospect of dried flower and pressed flower processing. Kor. J. Hort. Sci. Technol. 19:262-269.

Ponting, J.D., D.W. Sanshuck, and J.E. Brekke. 1960. Color measurement and deterioration in grape and berry juices and concentrates. Food Res. 25:471-476.

Raworth, J. and S. Berry. 1993. Dried flowers for all seasons. Collins & Broun Ltd., Spain.

Sho, C.S., Y.J. Park, I.B. Lee, and B.G. Heo. 2001. Color and morphological characteristic of freeze-dried rose. J. Kor. Flower Res. Soc. 9:87-90.

Sohn, K.W. 2005. Optimum concentration of glycerine, Tween 20, and green food color for dry processing of Korean native conifer leaves. Kor. J. Hort. Sci. Technol. 23:465-470.

Sohn, K., H.J. Kwon, and E.Y. Kim. 2003. Optimum concentrations of dye for preserving Magnolia kobus and Magnolia grandiflora leaves. Kor. J. Hort. Sci. Technol. 21:233-238.

Wenxiang, L., Z. Yang, and Y. Zhijun. 1995. Stuies on the methods of making dry flower. J. Yunnan Agric. Univ. 10:207-212.

Yoo, E.H., Y.W. Seo, H.D. Kim, K.J. Kim, S.J. Jeong, M.I. Jeong, and J.S. Song. 2009. Utilization of digital image process to determinate the optimum concentration of glycerine in preserving dye during preserved rose flowers production. J. Kor. Soc. Flower Design 3(Suppl. I):21-23.

Information

Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
Publisher(Ko) :한국원예학회
Journal Title :Horticultural Science and Technology
Journal Title(Ko) :원예과학기술지
Volume : 32
No :3
Pages :390-399
Received Date : 2013-07-26
Revised Date : 2014-01-17
Accepted Date : 2014-02-05
DOI :https://doi.org/10.7235/hort.2014.13115

Horticultural Science and Technology 원예과학기술지 ISSN:1226-8763(Print) 2465-8588(Online)

All Issue