Relation between increases in stomatal conductance of decorative sepals and the quality of antique-stage cut hydrangea flowers

Yoshikuni Kitamura, Yukari Kato, Toshiki Yasui, Hiroe Aizawa, Sachiyo Ueno

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Cut hydrangea (Hydrangea spp.) flowers are marketed at two different harvest stages, the fresh-and antiquestages. Flowers cut at the fresh-stage are harvested just after the coloring of decorative sepals is completed before flowering, and flowers cut at the antique-stage are harvested when the decorative sepals develop green and/or red colors after flowering. In almost all cultivars, an increase in the hydraulic conductance of the stomata (stomatal conductance) of the abaxial side of decorative sepals occurs during the transition from the fresh to the antique-stage. We investigated the relation between the stomatal conductance increase and the severity of the damage to decorative sepals. The degree of stomatal conductance increase regressed with the severity of the damage occurrence to the antique-stage decorative sepals before harvest. The relation between the stomatal conductance increase and vase life of antique-stage cut hydrangea flowers was also investigated. Abscisic acid (ABA)-treated antique-stage cut flowers exhibited lower stomatal conductance on the abaxial side of decorative sepals than control cut flowers. A photoperiodic change in the transpiration was observed in the control cut flowers, but not in ABA-treated cut flowers. These ABA treated cut flowers had longer vase lives than control cut flowers. To achieve minimal damage before harvest and longer vase life in the antiquestage during cut hydrangea flower production, screening for stomatal conductance non-increasing cultivars would be desirable. Since the stomatal conductance of antique-stage decorative sepals showed a highly significant correlation with fresh-stage decorative sepals, these can be used as an index in screening for stomatal conductance non-increasing cultivars.

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalHorticulture Journal
Volume86
Issue number1
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Abscisic acid
  • Functional stomata
  • Sepal damage
  • Transpiration
  • Vase life

ASJC Scopus subject areas

  • Plant Science
  • Horticulture

Fingerprint Dive into the research topics of 'Relation between increases in stomatal conductance of decorative sepals and the quality of antique-stage cut hydrangea flowers'. Together they form a unique fingerprint.

Cite this