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Control of T-2 toxin in Fusarium langsethiae and geotrichum candidum co-culture

Gastelum-Martinez, Elida and Compant, Stéphane and Taillandier, Patricia and Mathieu, Florence Control of T-2 toxin in Fusarium langsethiae and geotrichum candidum co-culture. (2013) Archives of Industrial Hygiene and Toxicology / Arh Hig Rada Toksikol, vol. 63 (n° 4). pp. 447-456. ISSN 0004-1254

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Official URL: http://dx.doi.org/10.2478/10004-1254-63-2012-2206

Abstract

Due to contamination of barley grains by Fusarium langsethiae, T-2 toxin can be present in the brewing process. It has been observed that the presence of the yeast Geotrichum candidum during malting can reduce the final concentration of this mycotoxin in beer. In this work, a co-culture method was carried out for both microorganisms in order to evaluate the effect on T-2 mycotoxin concentration in comparison with the pure culture of F. langsethiae in the same conditions. The microbial growth of both microorganisms was assessed using three different methods: dry weight, DOPE-FISH, and DNA quantification. In co-culture, both microorganisms globally developed less than in pure cultures but G. candidum showed a better growth than F. langsethiae. The concentration of T-2 was reduced by 93 % compared to the pure culture. Hence, the interaction between G. candidum and F. langsethiae led to a drastic mycotoxin reduction despite the only partial inhibition of fungal growth.

Item Type:Article
HAL Id:hal-00879607
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
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Deposited By: Vincent GERBAUD
Deposited On:04 Nov 2013 12:38

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