Decomposition of the Fusarium graminearum toxin zearalenone in storage conditions.
The studies illustrate the effects of preservatives - "Luprosil" (propionic acid) and "Gasol" (contains organic acids and some additional compounds) on the growth of Fusarium graminearum and the quality of zearalenone in contaminated grain. The laboratory conditions resembled, concerning the supply of oxygen, the circumstances in the surface layers of preserved grain mass. The mycelium growth of the fungus Fusarium graminearum was visually observed. Three successions of studies of grain cultures were carried out before addition of preservatives and after 3, 14 and 28 days of storage: 1) liquid-chromatographic examination indicating the amount of soluble zearalenone in oat-wheat culture 2) bioassay indicating the amount of insoluble zearalenone in grain (solid residue) 3) bioassay indicating the total amount of zearalenone (insoluble + soluble zearalenone) in oat-wheat-barley culture. The preservatives completely prevented the visible mycelium growth of Fusarium graminearum. Propionic acid ("Luprosil") had no reducing effect on the quantity of zearalenone. "Gasol", on the contrary, reduced the amount of the mycotoxin very clearly. The decrease in different successions of studies was after 3, 14 and 28 days from the commencement of storage as follows: 1) 60, 90 and 95% 2) 15, 17 and 90% 3) 70, 80 and 90%.
D000821:Animal Feed; D002523:Edible Grain; D005519:Food Preservation; D005520:Food Preservatives / Q000494:pharmacology*; D005670:Fusarium / Q000378:metabolism*; D011422:Propionates / Q000494:pharmacology; D012118:Resorcinols / Q000378:metabolism*; D015025:Zearalenone / Q000378:metabolism*
D005520:Food Preservatives; D011422:Propionates; D012118:Resorcinols; D015025:Zearalenone