Identification des acides caféoylshikimiques des racines du palmier dattier, principaux composés fongitoxiques vis‐à‐vis de <i>Fusarium oxysporum</i> f. sp. <i>albedinis</i>

Abstract

Abstract 5‐caffeoylshikimic acid and its isomeres of position (dactylifric acid) found in the roots of date‐palms ( Phoenix daetylijera L.) inhibit the germination of conidia and the growth of the mycelium of Fusarium oxysporum f. sp. albedinis . The acid content accumulated in resistant cultivars are toxic to fungi, whereas that accumulated in sensitive cultivars does not seem to affect growth and development of the parasite. This well demonstrates the implication of caffeoylshikimic acid in the resistance of the date‐palm to this fusarium disease. Moreover, these results will be of great use, especially for screening resistant genotypes obtained from directed crossings or from in vitro cultures.