ACTIVITY AND QUANTITATIVE ANALYSIS OF PLASMALEMMA ATPASE IN BUDS AND BUD STANDS DURING VEGETATIVE BUD’S DORMANCY IN PEACH-TREE

Plant dormancy and dormancy breaking depend, at least partially, on peculiar short distance relationships between buds and bud stands.
In peach, it was previously observed that dormancy was related to high nutrient absorption potentialities in buds underlying tissues.
This situation could be linked to higher plasmalemma ATPase activity (EC 3.6.1.3), inducing a higher nutrient absorption, in bud stands.
This work consists in the characterization of the plasma membrane ATPase activity in vegetative buds and bud stands during the rest period and dormancy release.
During the dormancy period (October, November), plasma membrane ATPase activity was found to be higher in bud stands than in buds.
This was correlated with a lower amount of plasma membrane ATPase in buds compared to bud stand during this period.
According to this results, it can be postulated that dormancy release, in the peach, could be related to modifications of plasma membrane ATPase quantity, in buds and bud stands, during winter time.

IV International Peach Symposium

H.L. Aue, I. Lecomte, G. Pétel

P. persica, plasmalemma ATPase, dormancy, bud, bud stand

https://doi.org/10.17660/ActaHortic.1998.465.66