Studies on the role of abscisic acid in the initiation of bud dormancy inAlnus glutinosaandBetula pubescens

✍ Scribed by T. J. Hocking; J. R. Hillman

• Publisher: Springer-Verlag
• Year: 1975
• Tongue: English
• Weight: 435 KB
• Volume: 125
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00385600

✦ Synopsis

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-(14)C]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-(14)C]abscisic acid. The significance of these results with respect to the role of abscisic acid in regulating the induction of bud dormancy is discussed.