Two-dimensional environmental profiles of growth and fumonisin production by Fusarium proliferatum on a wheat-based substrate

摘要: The effect of water activity (aW; 0.995, 0.99, 0.98, 0.96, 0.94, 0.92, and 0.90), temperature (15, 25, 30°C), incubation time (7, 14, 21 28days), their interactions on mycelial growth fumonisin production wheat-based medium by three Fusarium proliferatum strains isolated from wheat in Argentina was evaluated. Maximum rates were obtained at the highest aW (0.995) 30°C, with decreasing as reduced. amounts total fumonisins (FB1, FB2 FB3) produced 0.99 25°C after 28days for 2 strains, 15°C 0.98 third strain. concentrations varied considerably depending assayed. studied had different profiles. F. ITEM 15661 15664 FB1 whereas 15654 able to produce FB1, FB3. Interestingly, profiles each particular strain related temperatures. Fumonisins 15 30°C values 0.92 0.995 incubation. However 7 14days small lower than 0.94. Two-dimensional developed these data identify areas where conditions indicate a significant risk accumulation wheat. Temperature that resulted are those found during grain development (especially milk dough stages) field. This study provides useful base line representing high low contamination which is becoming greater concern because this cereal destined mainly human consumption.