The perception of elicitors by plants involves the expression of a coordinated series of biochemical changes leading to the induc- tion of defence responses. These include the accumulation of active oxygen species; the synthesis of pathogenesis-related proteins and phytoalexins, and the activation of various defence-related enzymes [12]. Among these, peroxidases (POX) are oxido-reductase enzymes that participate to cell wall reinforcement thereby limiting fungal penetration [13]. Polyphenoloxidases (PPO) are copper metaloproteins that contribute to plant cell defence by catalyzing the oxidation of phenolics and their conversion into antimicrobial quinones. These compounds are highly reactive, modifying and cross-linking a variety of cellular constituents [14]. In date palm, we have previously shown that these enzymes are involved in resistance of date plam plants to infection by Foa