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These studies are concerned with the isolation and identification of secondary metabolites produced by Fusarium oxysporum f. sp. albedinis (F. o. a.), the causal agent of bayoud, the wilt disease of the date palm (Phoenix dactylifera L.). Fungal secondary metabolites are chemical compounds identified in a limited number of species. They consist of toxins, antibiotics and antifungal agents. Among the metabolites we could isolate from the pathogen grown in a liquid medium, and then identify by gas chromatography coupled with mass spectrometry (GC-MS), phenylacetic acid has been distinguished. This compound is widely described in the literature as having antimicrobial, antifungal, phytotoxic properties and also endowed with hormonal activity similar to that of indole acetic acid (IAA). To date, this metabolite has never been reported in F. o. a., (2010 Académie des sciences. Published by Elsevier SAS. All rights reserved.)

The authors describe a method of estimation of clometacine in biological fluids based on extraction in the pure state of a pair of ions, purification by chromatography (in liquid phase, adsorption, then exchange, methylation by diazo-methane and gas chromatography associated with detection by electron capture.