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2017 Vol.35, Issue 6 Preview Page
Greenhouse Dehumidification Extends Postharvest Longevity of Cut Roses in Winter Season
Jin Hee Lim1
,
Hyung-Won Choi1
,
Suong T. T. Ha1
,
Byung-Chun In2*
1Department of Bioindustry and Bioresources Engineering, Sejong University
2Department of Horticulture and Breeding, Andong National University
*교신저자. *Corresponding Author. 
31 December 2017. pp. 737-746
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Abstract

A strong inverse relationship between the preharvest relative air humidity (RH) and the postharvest longevity of cut roses has been observed previously. High RH levels common in greenhouses during winter reduce the vase life of cut roses, through the alteration of morphological and physiological characteristics. In this study, we investigated the use of a dehumidification system to reduce greenhouse RH levels and improve the postharvest longevity of cut roses. Longevity varied between seasons, with the longest vase life observed in spring (14.7 d), and shortest vase life in winter (9.1 d). Daily minimum RH (r = -0.80, p < 0.01) most strongly correlated with reduced vase life of cut flowers. Dehumidification effectively reduced greenhouse RH levels in winter and cut roses grown under the dehumidification environment showed a longer average vase life as well as higher fresh weight and thicker stem diameter compared to flowers grown under normal conditions (control). Stomata from cut roses grown in the dehumidification environment also had smaller, more responsive stomata, which likely contributed to longer vase life via effective regulation of transpiration. The current study demonstrates that dehumidification is an effective method for improving postharvest longevity and quality of cut roses in greenhouse production.

Keywords
humidity
stomata
transpiration
vase life
VPD
Rosa hybrida L. ‘Lovely Lydia’

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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :원예과학기술지
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 35
  • No :6
  • Pages :737-746
  • DOI :https://doi.org/10.12972/kjhst.20170078
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