Montani M L, Vaamonde G, Resnik S L, Buera P
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina.
Int J Food Microbiol. 1988 Feb;6(1):1-8. doi: 10.1016/0168-1605(88)90078-5.
The influence of water activity (aw) and temperature on the zearalenone biosynthesis in corn has been examined. Viable corn kernels were conditioned at different values of water activity (0.90, 0.95 and 0.97), inoculated with Fusarium graminearum and incubated at different temperatures. Zearalenone was determined at selected times. For the strain used, a constant temperature of 25 degrees C resulted more favorable than 15 degrees C, 20 degrees C and the combination of two weeks at 25 degrees C followed by incubation at 15 degrees C shown by other authors to increase the zearalenone accumulation. Both F. graminearum growth and zearalenone production at 25 degrees C were inhibited at water activity 0.90. At short incubation times, toxin accumulation was greater at water activity 0.97 than at water activity 0.95 (25 degrees C). This relation was inverted at longer periods of incubation. A combined effect of water activity and temperature on the zearalenone accumulation was observed.
研究了水分活度（aw）和温度对玉米中玉米赤霉烯酮生物合成的影响。将有活力的玉米粒调节至不同的水分活度值（0.90、0.95和0.97），接种禾谷镰刀菌，并在不同温度下培养。在选定的时间测定玉米赤霉烯酮。对于所用菌株，25℃的恒温条件比15℃、20℃以及其他作者所表明的先在25℃培养两周然后在15℃培养更有利于玉米赤霉烯酮的积累。在水分活度为0.90时，25℃下禾谷镰刀菌的生长和玉米赤霉烯酮的产生均受到抑制。在短培养时间内，25℃时水分活度为0.97时的毒素积累比水分活度为0.95时更大。在较长培养期时，这种关系则相反。观察到水分活度和温度对玉米赤霉烯酮积累有综合影响。
