A Review on the Root System of Argania spinosa

Abstract

The Argane tree [Argania spinosa (L.) Skeels] is a remarkable essence by its botanical interest, ecological services, and its socio-economic value. This endemic species is known by its adaptive behavior to arid and semi-arid regions where it grows naturally in vast forests in Southwestern Morocco. Although its adaptation has been commonly attributed to various mechanisms in different organs and tissues, whose the root system has a primary role in this whole process. However, the increased aridity and desertification in the Mediterranean region appear to affect the health, growth and functioning of the root system of A. spinosa. In this review, we highlighted morphological aspects and physiological and biochemical mechanisms related to the roots and involved in the abiotic stress tolerance in the Argane tree. The mycorrhizal symbiosis in Argane tree plays a vital role in nutrient uptake and growth of this woody species, ​as well as in the adaptation to its environment. Despite the difficulties encountered in rooting during ​its in vitro propagation, this technique seems to be an attractive alternative for the regeneration of the selected Argane tree.