Flower development and effects of a cold treatment and a supplemental gibberellic acid application on flowering of Helleborus niger and Helleborus x ericsmithii

A. Christiaens, Emmy Dhooghe, D. Pinxteren, M. C. Van Labeke

    Onderzoeksoutput: Bijdrage aan tijdschriftA1: Web of Science-artikelpeer review

    Uittreksel

    The increased horticultural interest in Helleborus requires the development of techniques for flowering control. Therefore, we have determined flower initiation and differentiation under natural conditions for Helleborus niger L and the hybrid Helleborus x ericsmithii B. Mathew. Once flower primordia were present in the underground buds of the plants, the effect of a cold treatment (336, 504 or 672 chilling units (CU)) and a supplemental gibberellic acid (GA(3)) application (500 mg L-1) on pre-cooled plants was examined. The cold treatment resulted in a progressive decrease of the time to flower. Moreover, when pre-cooled plants received a supplemental GA(3) application early flowering was further enhanced and these plants had a higher number of flowers with longer flower stems and larger flowers. (c) 2012 Elsevier B.V. All rights reserved.
    Oorspronkelijke taalEngels
    TijdschriftScientia Horticulturae
    Volume136
    Pagina's (van-tot)145-151
    Aantal pagina’s7
    ISSN0304-4238
    DOI's
    PublicatiestatusGepubliceerd - 1-mrt-2012

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