Studies on the role of abscisic acid in the initiation of bud dormancy in Alnus glutinosa and Betula pubescens |
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Authors: | T J Hocking J R Hillman |
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Institution: | (1) Department of botany, University of Glasgow, G12 8QQ Glasgow, UK;(2) Present address: Department of Biological Sciences, The Polytechnic, WV1 1LY Wolverhampton, UK |
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Abstract: | Summary The effects of leaf-applied (+-)-abscisic acid on the growth and dormancy of Betula pubescens Ehrh. and Alnus glutinosa Gaertn. growing under long days provide no evidence that leaf-applied abscisic acid induces or promotes the formation of resting buds in these species. Radiotracer studies show that a small percentage of the radioactivity applied as 2-14C]abscisic acid to the leaves accumulates in the apical region of the shoot. Of the radioactivity that was recovered from this region after 8 days, less than 10% was chromatographically similar to 2-14C]abscisic acid. The significance of these results with respect to the role of abscisic acid in regulating the induction of bud dormancy is discussed.Abbreviation ABA
abscisic acid |
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