Growth Kinetic Parameters and Prediction of Growth and Zearalenone and Deoxynivalenol Production Boundaries by Three Fusarium asiaticum Strains Isolated from Wheat

Fusarium species can cause head blight of cereals worldwide. This is accompanied by impacts on yield and contamination grains with mycotoxins. Regulations, maximum limits, exist for the relevant mycotoxins (e.g., type A B trichothecenes, zearalenone fumonisins). There interest in a better understanding effect key interacting abiotic factors which determine colonization mycotoxin production small grain cereals. Thus, this study examined ecophysiological relationship between temperature water availability (10–35 °C; activity, aw, 0.87–0.98) growth (zearelenone, ZEA; deoxynivalenol, DON; 3-acetyl 3-Ac-DON nivalenol, NIV) three strains F. asiaticum, pathogen isolated from China becoming important other global regions. These were carried out simulated wheat-based matrices that identified optimum (25 °C/0.98 aw) marginal boundary conditions (35 °C/0.90 all strains. Contrarily, different mycotoxigenic profiles observed (p < 0.05). Four assessed produced at 30 °C while cold inhibited NIV ZEA, never detected <20 <15 °C, respectively. Optimal varied each toxin ZEA was best °C/0.93–0.95 DON, 0.98 aw/20–30 °C. Probabilistic models used to predict regulated asiaticum. will be beneficial development mitigation strategies control pre- post-harvest