Opposing effects of abscisic acid on senescence of rose flowers |
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| Authors: | Halevy, A. H. Mayak, S. Tirosh, T. Spiegelstein, H. Kofranek, A. M. |
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| Affiliation: | The Hebrew University of Jerusalem, Department of Ornamental Horticulture Rehovot, Israel |
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| Abstract: | Abscisic acid induced stomatal closure and reduced water lossof cut rose flower shoots bearing leaves. Its effect was verypronounced when these flowers were exposed to atmospheric stressconditions. Even short-term treatments (24 hr) with ABA extendedthe longevity of the flowers. However, in a stomata-less system(leafless flower shoots), or in leafy shoots held in darknesswhen all stomata were closed, ABA enhanced aging of the flowersand some biochemical processes associated with it (RNase activityand reduction in protein content). 1Agricultural Research Organization, The Volcani Center.2Present address: Dept. of Environmental Horticulture, Universityof California, Davis, Calif. (Received May 2, 1974; ) |
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