DEVELOPPEMENT VEGETATIF ET LONGEVITE DE L’Acacia raddianaAU SAHARA SEPTENTRIONAL

Abstract

This study aims to identify some of the morphological, properties, which helped Acacia raddiana of Fabaceae family to growing and reproducting in arid areas like Algerian Sahara.In order of this, we have identified the area named "Méguiden" of the department of Timimoun, for the selection of trees that were categorized into three sections of age depending on the measurement circumference of their trunks. The obtained results confirmed that the genus Acacia raddiana, adopt some strategies leading to effective use of water from the layer surrounding the securities and as well as; hairy leaves and inflorescences, and as well as the presence of long thorns. All these factors, this specie to be one of the most important phreatic plants, which can supply water, located in the depths of the soil.