The Vase Life of Cut Gerbera Flowers is Extended by Combined Treatment with Gibberellin A3 and Calcium Chloride

Treatment with calcium chloride (CaCl2) is known to suppress the occurrence of flower stem bending and extend the vase life of cut gerbera. To clarify whether vase life extension by CaCl2 is improved by combined treatment with gibberellin A3 (GA3), the effect of treatment with 50 mg·L−1 GA3, 5 g·L−1...

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Bibliographic Details
Published in:Horticulture journal 2024, Vol.93(2), pp.126-134
Main Authors: Tonooka, Makoto, Iriya, Akari, Ichimura, Kazuo
Format: Article
Language:English
Subjects:
Bending
Calcium chloride
Combined treatment
flower stem bending
Gibberellins
Life extension
petal longevity
Petals
Senescence
Stems
tubular floret opening
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Summary:Treatment with calcium chloride (CaCl2) is known to suppress the occurrence of flower stem bending and extend the vase life of cut gerbera. To clarify whether vase life extension by CaCl2 is improved by combined treatment with gibberellin A3 (GA3), the effect of treatment with 50 mg·L−1 GA3, 5 g·L−1 CaCl2 or in combination on the vase life of the cut gerbera ʻMinouʼ was investigated. To inhibit bacterial proliferation, which is known to shorten vase life, an isothiazoline antimicrobial compound was included in the vase solution. Treatment with GA3 alone delayed the opening of tubular florets and increased the area of unopen florets, but stem elongation which led to stem bending shortened vase life. Treatment with GA3 in combination with CaCl2 suppressed the occurrence of stem bending. Combined treatment with GA3 and CaCl2 extended the vase life of cut gerbera more than treatment with CaCl2 alone. To clarify whether GA3 delays petal senescence, the effect of GA3 at 10 and 50 mg·L−1 on petal senescence was investigated using shortened stems. GA3 at both concentrations significantly delayed petal senescence. Combined treatment with GA3 and CaCl2 also significantly extended the vase life of the cut gerbera ʻKimseyʼ and ʻSandyʼ. It was concluded that combined treatment with GA3 and CaCl2 is a suitable treatment for extending the vase life of cut gerbera.
ISSN:2189-0102
2189-0110
DOI:10.2503/hortj.QH-109