Water relations and keeping-quality of cut Gerbera flowers. V. Role of endogenous cytokinins

U. van Meeteren, H. van Gelder

    Research output: Contribution to journalArticleAcademicpeer-review

    6 Citations (Scopus)


    The objective of the present work was to investigate if differences in internal water relations, due to differences in membrane permeability, between Gerbera petals of inflorescences ageing in a vase and on the plant could be ascribed to differences in cytokinin activities. Moreover, cytokinin activities in petal-extracts of 3 cultivars, differing in their keeping-quality, were compared. Cytokinin activities (“free” and “bound”) in petals decreased during the first 6 days of the experiment (both in the vase and on the plant). On Day 8, a very high activity was found in almost all the Rf-fractions of the chromatogram. After Day 8, the activity decreased again. For young inflorescences, developing on the plant, a peak level was reached for “free” cytokinins at a very early bud stage and for “bound” cytokinins when the petals were just fully expanded. There were no correlations between petal-cytokinin activities at day of harvest of 3 Gerbera cultivars and their keeping-quality. It is concluded that changes in membrane permeability, which occur during ageing of petals of cut Gerbera inflorescences, are not triggered by changes in cytokinin activities.
    Original languageEnglish
    Pages (from-to)273-281
    JournalScientia Horticulturae
    Issue number3
    Publication statusPublished - 1980

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