Streptomyces sp. ASBV-1 reduces aflatoxin accumulation by Aspergillus parasiticus in peanut grains

• Published in: Journal of applied microbiology Vol. 105; no. 6; pp. 2153 - 2160
• Main Authors: Zucchi, T.D, de Moraes, L.A.B, de Melo, I.S
• Format: Journal Article
• Language: English
• Published: Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01.12.2008; Blackwell Publishing Ltd; Blackwell
• Subjects: Actinobacteria; aflatoxin inhibition; Aflatoxins - analysis; Arachis - chemistry; Arachis - microbiology; Arachis - physiology; Arachis hypogaea; Aspergillus - physiology; Aspergillus parasiticus; Biological and medical sciences; Chromatography, Thin Layer; Edible Grain; Food Contamination - prevention & control; Fundamental and applied biological sciences. Psychology; Mass Spectrometry - methods; Microbiology; spore viability; Spores, Fungal - physiology; Streptomyces; Streptomyces - physiology; Streptomycetaceae; Grains; Applied microbiology; Mycotoxin; Streptomyces; Accumulation; Spores; Actinomycetales; Fungi; Toxin; Aspergillus parasiticus; aflatoxin inhibition; Bacteria; Cereal; spore viability; Actinomycetes; Fungi Imperfecti; Inhibition; Viability; Aflatoxin
• ISSN: 1364-5072; 1365-2672
• DOI: 10.1111/j.1365-2672.2008.03940.x

To evaluate the ability of Streptomyces sp. (strain ASBV-1) to restrict aflatoxin accumulation in peanut grains. In the control of many phytopathogenic fungi the Streptomyces sp. ASBV-1 strain showed promise. An inhibitory test using this strain and A. parasiticus was conducted in peanut grains to evaluate the effects of this interaction on spore viability and aflatoxin accumulation. In some treatments the Streptomyces sp ASBV-1 strain reduced the viability of A. parasiticus spores by c. 85%, and inhibited aflatoxin accumulation in peanut grains. The values of these reductions ranged from 63 to 98% and from 67% to 96% for aflatoxins B₁ and G₁, respectively. It was demonstrated that Streptomyces sp. ASBV-1 is able to colonize peanut grains and thus inhibit the spore viability of A. parasiticus, as well as reducing aflatoxin production. The positive finding for aflatoxin accumulation reduction in peanut grains seems promising and suggests a wider use of this actinobacteria in biological control programmes.