title: Control of T-2 toxin in Fusarium langsethiae and Geotrichum candidum co-culture.
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 coculture, 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.
authors: Université de Toulouse, INPT-ENSAT, Laboratoire de Génie Chimique Castanet-Tolosan, Toulouse, France.
authors: Elida
authors: E
authors: Gastélum-Martínez
authors: Stephane
authors: S
authors: Compant
authors: Patricia
authors: P
authors: Taillandier
authors: Florence
authors: F
authors: Mathieu
mesh_terms: D001515:Beer / Q000032:analysis / Q000382:microbiology; D018920:Coculture Techniques; D002523:Edible Grain / Q000382:microbiology; D005670:Fusarium / Q000145:classification / Q000254:growth & development* / Q000378:metabolism; D005848:Geotrichum / Q000145:classification / Q000254:growth & development* / Q000378:metabolism; D013045:Species Specificity; D013605:T-2 Toxin / Q000096:biosynthesis / Q000302:isolation & purification*
chemical_list: D013605:T-2 Toxin