Summary
Concentrations of AMP, ADP, ATP, and inorganic phosphate (Pi) were determined in buds of five deciduous tree species (Acer pseudoplatanus, Alnus glutinosa, Fagus sylvatica, Fraxinus excelsior, Quercus robur) during spring reactivation from February to the middle of May. In closed buds of diffuse-porous wood trees (Acer, Alnus, Fagus), the content of adenine nucleotides (AdN) increased temporarily between the middle of February and the middle of March. The main increase of AdN concentration appeared either when buds became swollen (Fraxinus, Fagus, Quercus), or at the time of bud-break (Acer, Alnus). Pi content in general decreased during the course of reactivation. It was almost zero in buds of Quercus at bud-break and afterwards, but in Fraxinus Pi concentration rose when bud-break took place. The extremely low AdN content in Quercus buds is contrasted by a steep increase in AdN content in Fraxinus following bud-break. The decrease of AdN content in emerging leaves of Quercus and Fagus could be related to the high age of these trees.
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Abbreviations
- AdN :
-
adenine nucleotide(s)
- DTT :
-
dithiothreitol
- EDTA :
-
ethylenediaminetetraacetic acid
- PEP :
-
phosphoenolpyruvate
- Pi :
-
orthophosphate
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Supported by Deutsche Forschungsgemeinschaft and by Bundesministerium für Forschung und Technologie, Federal Republic of Germany.
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Fromm, J., Eschrich, W. Changes of adenine nucleotide and orthophosphate concentrations in buds of deciduous trees during spring reactivation. Trees 1, 42–46 (1986). https://doi.org/10.1007/BF00197023
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DOI: https://doi.org/10.1007/BF00197023