中文摘要：禾谷镰刀菌的定殖产生玉米赤霉烯酮（ZEN）污染，这在粮食及饲料小麦中特别重要，尤其是粮食和饲料小麦在有立法限值的收割后储藏期间。相关风险的超限指标非常有用。本研究测定了不同水活度(a(w)；0.95-0.9)和温度（10-25摄氏度）对接种了禾谷镰刀菌并储藏15天的自然污染小麦粒及辐照小麦粒（a）呼吸速率；（b）干物质损失(DML)；（c）ZEN产生及（d）相对于欧盟立法限值的DML与ZEN污染关系的影响。这类数据对于建立不同霉菌毒素相对风险的采后决策支持系统数据库很重要。
外文摘要：Zearalenone (ZEN) contamination from Fusarium graminearum colonization is particularly important in food and feed wheat, especially during post-harvest storage with legislative limits for both food and feed grain. Indicators of the relative risk from exceeding these limits would be useful. We examined the effect of different water activities (a(w); 0.95-0.90) and temperature (10-25 degrees C) in naturally contaminated and irradiated wheat grain, both inoculated with F. graminearum and stored for 15 days on (a) respiration rate; (b) dry matter losses (DML); (c) ZEN production and (d) relationship between DML and ZEN contamination relative to the EU legislative limits. Gas Chromatography was used to measure the temporal respiration rates and the total accumulated CO2 production. There was an increase in temporal CO2 production rates in wetter and warmer conditions in all treatments, with the highest respiration in the 25 degrees C x 0.95 a(w) treatments + F. graminearum inoculation. This was reflected in the total accumulated CO2 in the treatments. The maximum DMLs were in the 0.95 a(w)/20-25 degrees C treatments and at 10 degrees C/0.95 a(w). The DMLs were modelled to produce contour maps of the environmental conditions resulting in maximum/minimum losses. Contamination with ZEN/ZEN-related compounds were quantified. Maximum production was at 25 degrees C/0.95-0.93 a(w) and 20 degrees C/0.95 a(w). ZEN contamination levels plotted against DMLs for all the treatments showed that at ca. <1.0% DML, there was a low risk of ZEN contamination exceeding EU legislative limits, while at >1.0% DML, the risk was high. This type of data is important in building a database for the development of a post-harvest decision support system for relative risks of different mycotoxins.
外文关键词：Fusarium graminearum；mycotoxins；water activity；temperature；respiration rates；risk；cereals
作者：Garcia-Cela, E；Kiaitsi, E；Sulyok, M；Medina, A；Magan, N
作者单位：Cranfield Univ
期刊名称：TOXINS
期刊影响因子：3.571
出版年份：2018
出版刊次：2
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