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AbstractAbstract
[en] Results show that copper is easily retained by enzymatically isolated cuticles from pear leaves discs. The sorption is very rapid during the first hour, then progressively slower with increasing time. Upper and lower cuticles exhibit the same sorption when immersed, but the sorption by the upper internal surface is greater than that by the external surface. Sorption depends on the dates of sampling of the leaves and vegetal species. The variation of the process with concentrations is hyperbolic. The retained copper may be partially exchanged: from 16 to 95% after 24 hours of exchange in a cupric solution, as the Cu concentration increases from 10-6 to 10-2M. The penetration of copper through astomatous cuticular discs is extremely reduced if there is pure water in the receiver unit
[fr]
Il est montre que le cuivre se fixe facilement sur des cuticules isolees par voie enzymatique, a partir de feuilles de Poirier. La fixation par des cuticules superieure et inferieure est comparable, elle est rapide durant la premiere heure puis progressivement plus lente; elle est nettement plus importante a partir de la face interne. La fixation depend de la date de prelevement des feuilles et de l'espece vegetale. Elle varie en fonction des concentrations selon une courbe d'allure hyperbolique. Le cuivre fixe est en partie echangeable de 16 a 95% apres 24 heures d'echange sur une solution cuivrique lorsque la concentration varie de 10-6 a 10-2M. La penetration du cuivre a travers des cuticules issues de la face sans stomate est extremement faible si l'eau pure est choisie comme liquide receveurOriginal Title
Absorption foliaire du cuivre: etude de la fixation et de la penetration cuticulaires
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Record Type
Journal Article
Journal
Physiologie Vegetale; v. 15(4); p. 679-693
Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, COPPER ISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, ISOTOPE APPLICATIONS, ISOTOPES, METALS, NUCLEI, ODD-ODD NUCLEI, PLANTS, RADIOISOTOPES, TRANSITION ELEMENTS, TREES, UPTAKE
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