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.
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Abbreviations
- ABA:
-
abscisic acid
References
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Hocking, T.J., Hillman, J.R. Studies on the role of abscisic acid in the initiation of bud dormancy in Alnus glutinosa and Betula pubescens . Planta 125, 235–242 (1975). https://doi.org/10.1007/BF00385600
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DOI: https://doi.org/10.1007/BF00385600