Influence de l'aluminium sur la sélectivité racinaire de plantes calcicole et calcifuge

Abstract

The study of the influence of an increasing quantity of aluminium on adsorption and uptake of mineral nutrients in the horsebean (Vicia faba minor L., calcicole) and the yellow lupine (Lupinus luteus L., calcifuge) shows that selectivity in adsorption occurs only for the calcicole species.The decrease of cation exchange capacity of roots with increments in the quantity of aluminium would represent the toxicity of this cation; aluminium would transform its own exchange sites into an inactivated form: This structure on the root surface would allow a diffuse absorption process of this element in roots.