中文摘要：偶然在挪威燕麦谷物中检测到主要由镰刀菌产生的高浓度霉菌毒素HT-2和T-2（HT2 + T2）。在这项研究中，我们确定了影响挪威燕麦谷物中HT2+T2积累的天气变量。我们从农民田间收集2004-2013年燕麦谷物样本和天气数据。计算了在收获时燕麦中的HT2+T2污染与燕麦生长阶段（分蘖，开花等）时估计物候窗口内一系列天气总结之间的斯皮尔曼等级相关系数。此外，我们建立了一个数学模型来预测燕麦谷物中HT2+T2的风险。我们的数据显示，根据生长季节观察到的天气数据，可以实现对收获时燕麦谷物中HT2+T2风险的充分预测。除了孕穗期适温，潮湿凉爽的环境也与收获的燕麦谷物中HT2+T2的增加相关，而在拔节期和花朵萌发期间的温暖潮湿天气或凉爽但在孕穗期无雨的天气则会降低HT2+T2积累风险。开花后立即温暖潮湿的天气增加HT2+T2积累风险，而温和的温度但发育期间没有雨水则降低燕麦谷物中HT2+T2积累的风险。我们的数据表明，燕麦中的HT2+T2污染受到开花前和开花后天气条件的影响。这些研究结果与之前的一项调查燕麦中脱氧雪腐镰刀菌烯醇污染风险的研究相反，该研究认为毒素积累主要受开花后天气条件的影响。
外文摘要：High concentrations of the mycotoxins HT-2 and T-2 (HT2 + T2), primarily produced by Fusarium langsethiae, have occasionally been detected in Norwegian oat grains. In this study, we identified weather variables influencing accumulation of HT2 + T2 in Norwegian oat grains. Oat grain samples from farmers' fields were collected together with weather data (2004-2013). Spearman rank correlation coefficients were calculated between the HT2 + T2 contamination in oats at harvest and a range of weather summarisations within estimated phenological windows of growth stages in oats (tillering, flowering etc.). Furthermore, we developed a mathematical model to predict the risk of HT2 + T2 in oat grains. Our data show that adequate predictions of the risk of HT2 + T2 in oat grains at harvest can be achieved, based upon weather data observed during the growing season. Humid and cool conditions, in addition to moderate temperatures during booting, were associated with increased HT2 + T2 accumulation in harvested oat grains, whereas warm and humid weather during stem elongation and inflorescence emergence, or cool weather and absence of rain during booting reduced the risk of HT2 + T2 accumulation. Warm and humid weather immediately after flowering increased the risk, while moderate to warm temperatures and absence of rain during dough development, reduced the risk of HT2 + T2 accumulation in oat grains. Our data indicated that HT2 + T2 contamination in oats is influenced by weather conditions both pre- and post-flowering. These findings are in contrast with a previous study examining the risk of deoxynivalenol contamination in oat reporting that toxin accumulation was mostly influenced by weather conditions from flowering onwards.
外文关键词：Fusarium langsethiae; Prediction model; Phenological windows; Spearman rank correlation coefficient
作者：Hjelkrem, Anne-Grete Roer; Aamot, Heidi Udnes; Brodal, Guro; 等.
作者单位：Norwegian Inst Bioecon Res NIBIO
期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY
期刊影响因子：1.466
出版年份：2018
出版刊次：2
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