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Interrelationship of several phytohormones in the regulation of rose petal senescence


, : Interrelationship of several phytohormones in the regulation of rose petal senescence. Acta Horticulturae (41): 103-116

Petal senescence was studied in cut flowers of the cvs Dr. Verhage (short-lived) and Lovita (long-lasting). At least 3 phytohormones, viz. cytokinins, ethylene and abscisic acid (ABA), controlled senescence. The endogenous level of cytokinins declined with age, being lower in Dr. Verhage than in Lovita. Ethylene evolution rose in the initial stage of senescence, being higher in Dr. Verhage.

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