Correlative Changes in Phytohormones in Relation to Senescence Processes in Rose Petals |
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| Authors: | S MAYAK A H HALEVY M KATZ |
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| Institution: | Agricultural Research Organization, The Volcani Center and The Hebrew University, Faculty of Agriculture, Rehovot, Israel |
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| Abstract: | A comparative study of the level of abscisic acid (ABA) and cytokinin and of ethylene production by rose (Rosa sp.) petals of the short-lived cultivar Golden Wave (Dr. Verhage) and the long-lived cultivar Lovita was conducted. In both cultivars, the level of ABA increased as the flowers aged; it was higher in Golden Wave in all developmental stages tested. Ethylene production by cut flowers of the two cuitivars remained low for a short time concomitant with development and then increased sharply. The rise in ethylene production occurred after 3 and 4 days in Golden Wave and Lovita, respectively. Cytokinin level increased as the flower started to open and then decreased to a low level. The significance of these changes in relation to maturation and senescence of rose petals is discussed. |
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