6533b838fe1ef96bd12a4475

RESEARCH PRODUCT

Antifungal activity of peracetic acid against toxigenic fungal contaminants of maize and barley at the postharvest stage

Jordi MañesRaquel CarbonellCarlos LuzJuan Manuel QuilesTiago De Melo NazarethRaquel TorrijosGiuseppe Meca

subject

0106 biological sciencesbiologyFilter paperChemistryInoculationAspergillus flavus04 agricultural and veterinary sciencesContaminationbiology.organism_classification040401 food science01 natural sciencesMinimum inhibitory concentrationchemistry.chemical_compound0404 agricultural biotechnology010608 biotechnologyPeracetic acidPenicillium verrucosumPostharvestFood scienceFood Science

description

Abstract Contamination of maize and barley grain during storage by the toxigenic fungi Aspergillus flavus (A. flavus) and Penicillium Verrucosum (P. verrucosum) is both an economic and a public health problem, especially in less industrialized countries. Peracetic acid (PA) is a compound used for the disinfection of food and food contact surfaces. Unlike other disinfectants, it leaves no toxic residues and its decomposition products (CH3COOH, O2 and H2O) are environmentally friendly. In order to apply PA to preserve maize and barley grain during storage, first, the Minimum Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration (MFC) against both fungi were determined in a 96-well sterile microplates. Then, the antifungal activity of the volatile PA was determined by depositing it on filter paper and Hydroxyethylcellulose (HEC) gels, which were placed in airtight 1L flasks together with PDA and maize and barley grain inoculated with both fungi. The MFC in liquid medium of A. flavus and P. verrucosum was 93.8 and 187.5 mg/L respectively. However, PA doses of 300 and 200 mg/L on HEC gels were required in order to observe significant antifungal and antimycotoxigenic activity in maize and barley grain inoculated with these fungi.

yearjournalcountryeditionlanguage
2021-08-01LWT
https://doi.org/10.1016/j.lwt.2021.111754