数字农科院2.0

Contamination and Translocation of Deoxynivalenol and Its Derivatives Associated with Fusarium Crown Rot of Wheat in Northern China

文献类型： 外文期刊

作者： Xuefeng Fan;Zhen Yan;Meixin Yang;Cees Waalwijk;Theo van der Lee;Anne van Diepeningen;Balazs Brankovics;Wanquan Chen;Jie Feng;Hao Zhang

作者机构：

关键词： Fusarium crown rot;Mycotoxin;Systematic distribution in natural field

期刊名称： Plant Disease

ISSN： 0191-2917

年卷期： 2021 年 105 卷 11 期

页码：

收录情况： JCR（2021版）

摘要： Fusarium crown rot (FCR) is one of the most important wheat diseases in northern China. The main causal agent of FCR, Fusarium pseudograminearum, can produce mycotoxins such as type B trichothecenes. Therefore, FCR could be an additional source of mycotoxin contamination during wheat production. Field inoculation experiments demonstrated that FCR disease severity strongly impacts the distribution pattern of trichothecenes in different wheat tissues. Mycotoxins were mainly observed in lower internodes, and a low amount was detected in the upper parts above the fourth internode. However, high levels of trichothecene accumulation were detected in the upper segments of wheat plants under field conditions, which would threaten the feed production. The variation of mycotoxin content among sampling sites indicated that besides disease severity, other factors like climate, irrigation, and fungicide application may influence the mycotoxin accumulation in wheat. A comprehensive survey of deoxynivalenol (DON) and its derivatives in wheat heads with FCR symptoms in natural fields was conducted at 80 sites in seven provinces in northern China. Much higher levels of mycotoxin were observed compared with inoculation experiments. The mycotoxin content varied greatly among sampling sites, but no significant differences were observed if compared at province level, which indicated the variation is mainly caused by local conditions. Trace amounts of mycotoxin appeared to be translocated to grains, which revealed that FCR infection in natural fields poses a relatively small threat to contamination of grains but a larger one to plant parts that may be used as animal feed. To our knowledge, this is the first report of trichothecene accumulation in wheat stems and heads, as well as grains after FCR infection in natural field conditions. These investigations provide novel insights into food and feed safety risk caused by FCR in northern China.

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