engleski

The Impact of Fusarium graminearum Contamination Levels of Barley on Deoxynivalenol and Zearalenone Content in Kilned Malt

The aim of this study was to establish the impact of initial F. graminearum contamination level of barley on deoxynivalenol (DON) and zearalenone (ZEA) content in kilned malt. The influence of applied unit operations during the malt production on development of the above- mentioned fungus and its ability to synthesize DON and ZEA was also considered. Barley samples contaminated with different initial F. graminearum contamination levels (0, 10 and 20%) were subjected to micromalting procedure. Barley samples, green malt and kilned malt underwent microbiological and toxicological analyses at which the share of F. graminearum contaminated grain and concentrations of mycotoxins were determined. The results show that the strongest proliferation of fungus occurred during steeping and germination, while the drying phase significantly reduced the contamination level. Furthermore, the results indicate that barley with higher initial F. graminearum contamination level ensured higher concentrations of mycotoxins in kilned malt. The highest DON concentrations were determined in germ/rootlets samples, while the highest ZEA concentrations were determined in kilned malt.

barley ; Fusarium graminearum ; malting ; deoxynivalenol ; zearalenone

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