Abstract

Liquid and vapour-phase antifungal activities of essential oil of Salvia aucheri Boiss. var. mesatlantica Maire. (endemic from Morocco) against fungi commonly causing deterioration of apple

Author(s): A. Laghchimi, M. Znini, L. Majidi*, J. Paolini, J-M. Desjobert and J. Costa

The essential oils of Salvia aucheri var. mesatlantica, an endemic medicinal plant from Morocco, have been studied using gas chromatography (GC) and GC-mass spectrometry (GC-MS). 38 compounds were identified and the major components were camphor (49.0%), 1,8-cineole (9.5%), viridiflorol (8.8%), camphene (7.8%), α-pinene (2.9%) and p-cymene (1.5%). The antifungal activity of the essential oil was evaluated in vitro by poison food (PF) technique and the volatile activity assay (VA) against three phytopathogenic causing the deterioration for apple such as Alternaria sp., Penicillium expansum and Rhizopus stolonifer. The results indicated that the essential oil of S. aucheri mesatlantica inhibited significatively the mycelial growth of all fungal strains tested (p<0.05). VA assay of essential oil was consistently found to be more effective than PF technique. The MIC (minimum inhibitory concentration) was 2 μL/mL air, whereas >2 μL/mL in PF technique for all strains tested. Fungal sporulation was also completely inhibited at 2 μL/mL air for three pathogens. The overall results suggest that S. aucheri mesatlantica essential oil have a potential as antifungal preservatives for the control of postharvest diseases of apple.

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