Antifungal and antimycotoxigenic activity of essential oils from eucalyptus globulus, Thymus capitatus and schinus molle

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Abstract

Essential oils (EO) of eucalyptus (Eucalyptus globulus L.), thymus (Thymus capitatus L.) pirul (Schinus molle L.) were evaluated for their efficacy to control Aspergillus parasiticus and Fusarium moniliforme growth and their ability to produce mycotoxins. Data from kinetics radial growth was used to obtain the half maximal inhibitory concentration (IC50). The IC50 was used to evaluate spore germination kinetic and mycotoxin production. Also, spore viability was evaluated by the MTT assay. All EO had an effect on the radial growth of both species. After 96 h of incubation, thymus EO at concentrations of 1000 and 2500 μL L–1 totally inhibited the growth of F. moniliforme and A. parasiticus, respectively. Eucalyptus and thymus EO significantly reduced spore germination of A. parasiticus. Inhibition of spore germination of F. moniliforme was 84.6, 34.0, and 30.6% when exposed to eucalyptus, pirul, and thymus EO, respectively. Thymus and eucalyptus EO reduced aflatoxin (4%) and fumonisin (31%) production, respectively. Spore viability was affected when oils concentration increased, being the thymus EO the one that reduced proliferation of both fungi. Our findings suggest that EO affect F. moniliforme and A. parasiticus development and mycotoxin production.

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López-Meneses, A. K., Plascencia-Jatomea, M., Lizardi-Mendoza, J., Rosas-Burgos, E. C., Luque-Alcaraz, A. G., & Cortez-Rocha, M. O. (2015). Antifungal and antimycotoxigenic activity of essential oils from eucalyptus globulus, Thymus capitatus and schinus molle. Food Science and Technology (Brazil), 35(4), 664–671. https://doi.org/10.1590/1678-457X.6732

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