The abscisic acid content of dormant birch buds
โ Scribed by M. A. Harrison; P. F. Saunders
- Publisher
- Springer-Verlag
- Year
- 1975
- Tongue
- English
- Weight
- 531 KB
- Volume
- 123
- Category
- Article
- ISSN
- 0032-0935
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โฆ Synopsis
Abscisic acid (ABA) has been identified in the buds and xylem sap of Betula verrucosa (Ehrh.). Buds also contain esterified ABA. In the course of the winter the proportion of esterified ABA in the buds undergoes a progressive increase which may be associated with emergence from dormancy.
๐ SIMILAR VOLUMES
Abscisie acid (ABA) has been identified by gas chromatography in xylem sap of the woody species apple, peach, willow, sugar maple, Tecon~aria capensis and Actinidia chinensis. The amounts of ABA present in each species are markedly different, varying from 9 to over 1000 ng/100 ml of sap.
Aseptically cultured lateral buds of Salix viminalis L. collected from field-grown trees exhibited a clear periodicity in their ability to respond to exogenous abscisic acid (ABA). Buds were kept unopened by ABA only when the plants were dormant or entering dormancy. Short days alone did not induce
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 tha