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Last update: May 2021

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UR 1264 - MYCSA : Mycologie et securite des aliments


Mycologie & Sécurité des Aliments
INRA Bordeaux-Aquitaine
BP 81
33883 Villenave d'Ornon Cedex

Ammoides pusilla Essential Oil: A Potent Inhibitor of the Growth of Fusarium avenaceum and Its Enniatin Production

16 November 2021

Effect of EOs on Fusarium avenaceum
Our new paper published in Molecules

Chakroun Y, Oueslati S, Atanasova V, Richard-Forget F, Abderrabba M, Savoie J-M. Ammoides pusilla Essential Oil: A Potent Inhibitor of the Growth of Fusarium avenaceum and Its Enniatin Production. Molecules. 2021; 26(22):6906.

This is the second article from the PhD work of Yasmine Chakoun (cotutelle University of Bordeaux / INAT - University of Carthage). This research was funded by the PHC-Utique program, project CMCU 18G0913/Campus
France 39198RK


Enniatins are mycotoxins produced by Fusarium species contaminating cereals and various agricultural commodities. The co-occurrence of these mycotoxins in large quantities with other mycotoxins such as trichothecenes and the possible synergies in toxicity could lead to serious food safety problems. Using the agar dilution method, Ammoides pusilla was selected among eight Tunisian plants for the antifungal potential of its essential oil (EO) on Fusarium avenaceum mycelial growth and its production of enniatins. Two EO batches were produced and analyzed by GC/MS-MS. Their activities were measured using both contact assays and fumigant tests (estimated IC50 were 0.1 µL·mL−1 and 7.6 µL·L−1, respectively). The A. pusilla EOs and their volatiles inhibited the germination of spores and the mycelial growth, showing a fungistatic but not fungicidal activity. The accumulation of enniatins was also significantly reduced (estimated IC50 were 0.05 µL·mL−1 for the contact assays and 4.2 µL·L−1 for the fumigation assays). The most active batch of EO was richer in thymol, the main volatile compound found. Thymol used as fumigant showed a potent fungistatic activity but not a significant antimycotoxigenic activity. Overall, our data demonstrated the bioactivity of A. pusilla EO and its high potential to control F. avenaceum and its enniatins production in agricultural commodities.