Chemical composition and antifungal efficacy of Tunisian Prunus armeniaca L. kernels with formulation of an antidermatophyte cream based on kernel powder

Abstract

The biological activities of plant products are extremely correlated to the constituents present in each derivate. The present research aims to obtain by gas chromatography, the chemical profile of Prunus armeniaca L. kernel volatile fractions. The evaluation of the in vitro antifungal activities of the sterilized powder and volatile fractions of the plant P. armeniaca L. kernels was performed. Diffusion in a solid medium and broth microdilution methods were applied on fungi with medical importance (dermatophytes, yeasts and Aspergillus spp.). P. armeniaca L. powder based antidermatphyte cream has been formulated. Hydro-distillation generated two volatile fractions (VF1 and VF2) and chromatographic analysis showed the presence of three compounds for VF1 (98.7 % benzaldehyde, 1.0 % benzyl alcohol and 0.3 % 1,8-cineole) and two compounds for VF2 (90.3 % benzaldehyde and 9.3 % benzyl alcohol). The 2.5 % to 5 % concentrations in powder showed antifungal activities against dermatophytic strains. 1.25 to 2 mg/mL concentrations in volatile fractions were efficient against yeast strains, with a better efficiency for the VF1. The creams formulated were stable, cosmetically attractive with satisfactory pH, viscosity and spread ability. Prunus armeniaca L. kernel powders and the cream derived from them exhibit potent antifungal activities. This work presents a simple, ecological and economical means of formulating antifungal active substances and valorizing natural products.