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Toxins 2010, 2(6), 1399-1413; doi:10.3390/toxins2061399

Effect of Antioxidant Mixtures on Growth and Ochratoxin A Production of Aspergillus Section Nigri Species under Different Water Activity Conditions on Peanut Meal Extract Agar

Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional Nº 36 Km 601 (5800) Río Cuarto, Córdoba, Argentina
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Received: 20 April 2010 / Revised: 26 May 2010 / Accepted: 8 June 2010 / Published: 10 June 2010
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Abstract

The effect of mixtures of antioxidants butylated hydroxyanisol (BHA) and propyl paraben (PP) on lag phase, growth rate and ochratoxin A (OTA) production by four Aspergillus section Nigri strains was evaluated on peanut meal extract agar (PMEA) under different water activities (aw). The antioxidant mixtures used were: BHA + PP (mM), M1 (0.5 + 0.5), M2 (1.0 + 0.5), M3 (2.5 + 0.5), M4 (0.5 + 1.0), M5 (1.0 + 1.0), M6 (2.5 + 1.0), M7 (5.0 + 2.5) and M8 (10 + 2.5). The mixture M8 completely suppressed mycelial growth for all strains. A significant stimulation in OTA production was observed with mixtures M1 to M5 mainly at the highest aw; whereas M6, M7 and M8 completely inhibited OTA production in all strains assayed; except M6 in A. carbonarius strain (RCP G). These results could enable a future intervention strategy to minimize OTA contamination. View Full-Text
Keywords: butylated hydroxyanisol; propyl paraben; growth parameters; ochratoxin A; Aspergillus carbonarius; A. niger aggregate; peanut meal extract agar butylated hydroxyanisol; propyl paraben; growth parameters; ochratoxin A; Aspergillus carbonarius; A. niger aggregate; peanut meal extract agar
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MDPI and ACS Style

Barberis, C.; Astoreca, A.; Fernandez-Juri, M.G.; Dalcero, A.M.; Magnoli, C. Effect of Antioxidant Mixtures on Growth and Ochratoxin A Production of Aspergillus Section Nigri Species under Different Water Activity Conditions on Peanut Meal Extract Agar. Toxins 2010, 2, 1399-1413.

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