Molecules (Sep 2022)

Inhibitory Effect of GRAS Essential Oils and Plant Extracts on the Growth of <i>Aspergillus westerdijkiae</i> and <i>Aspergillus carbonarius</i> Strains

  • Mariana Paiva Rodrigues,
  • Águida Aparecida de Oliveira,
  • Gabriela Lago Biscoto,
  • Priscila Natália Pinto,
  • Raul Roque de Souza Dias,
  • Lauranne Alves Salvato,
  • Luiz Antonio Moura Keller,
  • Lilia Reneé Cavaglieri,
  • Carlos Alberto da Rocha Rosa,
  • Kelly Moura Keller

DOI
https://doi.org/10.3390/molecules27196422
Journal volume & issue
Vol. 27, no. 19
p. 6422

Abstract

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The effect of essential oils (obtained using hydrodistillation) and plant extracts (ethanolic, aqueous, and hexanic extractions) of 10 different plants cultivated in Brazil were tested using the diffusion agar method, with the objective of evaluating the inhibitory effect of the oils and extracts on the mycelial growth of Aspergillus westerdijkiae NRRL 3174 and A. carbonarius RC 2054 (UNRC). Of the 40 essential oils and plant extracts analyzed, oregano essential oil and plant extract, rosemary essential oil, and the clove ethanolic extract were the best choice to obtain the growth parameters (radial growth rates (mm day−1) and lag phase (h)) due the good results presented and the volume of oil/extract obtained. Comparing all the essential oils and plant extracts that were tested for growth parameters, the best results were obtained for the clove ethanolic extract for both strains assayed. These results demonstrated an outstanding potential use of some of these products in prevention of fungal contamination in food. However, further studies need to be conducted to determine the ability of these oils and extracts to inhibit or reduce ochratoxin A production.

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