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Avanço, Geleys Brado; Ferreira, Flavio Dias; Bomfim, Natália Silva; Santos, Paula Andréia de Souza Rodrigues dos; Peralta, Rosane Marina; Brugnari, Tatiane; Mallmann, Carlos Augusto; Abreu Filho, Benício Alves de; Mikcha, Jane Martha Graton; Machinski Jr, Miguel
Food control, March 2017, 2017-03-00, Letnik: 73Journal Article
Essential oils may be an alternative to the use of synthetic fungicides for the control of fungi involved in agricultural product deterioration. The aim of the present study was to evaluate the composition and antioxidant effect of turmeric essential oil and its antifungal and antimycotoxigenic action on Fusarium verticillioides (Sacc.) Nirenberg. The essential oil major components were α-turmerone (42.6%), β-turmerone (16.0%) and ar-turmerone (12.9%). The half-maximal inhibitory concentration (IC50) for the radical scavenging capacities of 2,2′-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) were 0.54 and 10.03 mg/ml, respectively, indicating good antioxidant activity. The application of 17.9 and 294.9 μg/ml of turmeric essential oil decreased the development of F. verticillioides by 56.0 and 79.3%, respectively, when compared with the fungal control. The scanning electron microscopy demonstrated that the oil decreased the thickness and the length of the microconidia. Ergosterol production significantly decreased (p < 0.05) in groups treated with the essential oil relative to the control, indicating an effect of the oil on fungal biomass. The production of B1 and B2 fumonisins was significantly inhibited (p < 0.05) in groups treated with the essential oil. The results suggest that turmeric essential oil has antioxidant, antifungal and antimycotoxigenic activities. •The essential oil of Curcuma longa exhibited chemopreventive effects.•The essential oil (EO) possesses good antioxidant activity.•The EO exhibited strong antifungal activity against F. verticillioides.•Turmeric essential oil inhibited the production of fumonisins.•The EO could be used as a potential source of eco-friendly preservatives.
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