Fumonisin B1, zearalenone and deoxynivalenol production by Fusarium moniliforme, F proliferatum and F graminearum in mixed cultures on irradiated maize kernels
2001
The impact on fungal growth and mycotoxin formation of interactions between fumonisin-producing isolates of Fusarium moniliforme and F proliferatum and a zearalenone (ZEA)- and deoxynivalenol (DON)-producing isolate of F graminearum inoculated together on irradiated maize at 15 and 25 degrees C and at 0.98, 0.95 and 0.93 a(w) was studied. The presence of F graminearum decreased the fungal populations (CFU g-1 grain) of F moniliforme and F proliferatum under almost all conditions tested. In the presence of F moniliforme, CFUs of F graminearum increased significantly at 25 degrees C, especially at 0.93 and 0.95 a(w), while the presence of F proliferatum caused them to increase at 15 degrees C. The presence of F graminearum always inhibited FB1 production, except at 25 degrees C and 0.98 a(w) where it increased. However, the observed differences were not statistically significant. There was no effect of fungal interaction on ZEA production by F graminearum; however, when paired with F moniliforme and F proliferatum, DON production by F graminearum was significantly stimulated, especially at 0.98 a(w).
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