Effect of environmental factors on Fusarium population and associated trichothecenes in wheat grain grown in Jiangsu province, China
Effect of environmental factors on Fusarium population and associated trichothecenes in wheat grain grown in Jiangsu province, China
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环境因素对中国江苏省小麦籽粒中镰刀菌种群及相关单端孢霉烯族化合物的影响
DOI：
10.1016/j.ijfoodmicro.2016.04.020
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发表时间：
2016-08-02
影响因子：
5.4
通讯作者：
Shi, Jianrong
中科院分区：
文献类型：
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作者：
Dong, Fei;Qiu, Jianbo;Shi, Jianrong
本研究旨在确定江苏省普遍存在的镰刀菌属物种、影响其频率的环境因素以及主要霉菌毒素污染的谷物。 2013-2015年降水量分别为184.2毫米、156.4毫米和245.8毫米，气温波动幅度2013年平均10.6±7.2℃，2014年10.9±7.2℃，2015年10.6±63℃。在小麦中观察到脱氧雪腐镰刀菌烯醇 (DON)、3-乙酰脱氧雪腐镰刀菌烯醇 (3ADON) 和 15-乙酰脱氧雪腐镰刀菌烯醇 (15ADON) 共存。 2013-2015年DON平均浓度分别为879.3±1127.8、627.8±640.5和1628.6±2168.0μg/kg。 2013-2015年3ADON的平均浓度分别为43.5±59.0、71.2±102.5和33.5±111.9μg/kg。我们发现小麦中 DON 的平均浓度与降水量呈正相关（r = 0.998，p < 0.01），而 3ADON 与降水量呈负相关（r = -0.887，p < 0.05）。然而，降水量与 15ADON 或雪腐镰刀菌烯醇 (NIV) 之间没有相关性。短期内温度的差异不如降雨量的差异那么显着。因此，温度与单端孢霉烯族化合物浓度之间不存在相关性，不包括 3ADON (r = 0.996，p < 0.01)。我们的数据表明，Fusarium asiaticum 是镰刀菌赤霉病苗圃中流行的主要病原真菌。 Fusarium graminearum sensu stricto (s. str.) 和 F. asiaticum 分离株之间的单端孢菌素化学型组成不同。 3ADON 化学型仅在 E asiaticum 菌株中发现。在禾谷镰刀菌菌株中未观察到 NW 化学型，而 15ADON 化学型代表了 100% 的禾谷镰刀菌菌株。本研究结果表明，2013-2015年江苏省环境条件与病原体种类或遗传化学型组成之间不存在相关性。 (C) 2016 Elsevier B.V. 保留所有权利。
The present study was performed to identify prevailing Fusarium species and the environmental factors affecting their frequencies and the contamination of grain with major mycotoxins in Jiangsu province. The precipitation levels were 184.2 mm, 156.4 mm, and 245.8 mm in the years 2013-2015, respectively, and the temperature fluctuated by an average of 10.6 +/- 7.2 degrees C in 2013,10.9 +/- 7.2 degrees C in 2014, and 10.6 +/- 63 degrees C in 2015. Co-occurrence of deoxynivalenol (DON), 3-acetyldeoxynivalenol (3ADON), and 15-acetyldeoxynivalenol (15ADON) were observed in wheat. The average concentrations of DON were 879.3 +/- 1127.8, 627.8 +/- 640.5, and 1628.6 +/- 2,168.0 mu g/kg in 2013-2015, respectively. The average concentrations of 3ADON were 43.5 +/- 59.0, 71.2 +/- 102.5, and 33.5 +/- 111.9 mu g/kg in 2013-2015, respectively. We found that the average concentration of DON in wheat was positively correlated with precipitation (r = 0.998, p < 0.01), and 3ADON was negatively correlated with precipitation (r = -0.887, p < 0.05). However, there was no correlation between precipitation and 15ADON or nivalenol (NIV). The differences in temperature were not as significant as the differences in rainfall amount over a short time period. Therefore, there were no correlations between temperature and the concentrations of trichothecenes, excluding 3ADON (r = 0.996,p < 0.01). Our data indicated that Fusarium asiaticum is the primary pathogenic fungus prevalent in the Fusarium head blight disease nursery. The trichothecene chemotype composition differed between Fusarium graminearum sensu stricto (s. str.) and F. asiaticum isolates. The 3ADON chemotype was found only among strains of E asiaticum. The NW chemotype was not observed among strains of F. graminearum, while the 15ADON chemotype represented 100% of the F. graminearum strains collected. The results of this study indicated no correlations between environmental conditions and the species or genetic chemotype composition of pathogens in Jiangsu province in 2013-2015. (C) 2016 Elsevier B.V. All rights reserved.