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Fitness of three chemotypes of Fusarium graminearum species complex in major winter wheat-producing areas of China

文献类型： 外文期刊

作者： Liu, Yang-yang 1 ; Sun, Han-yan 1 ; Li, Wei 1 ; Xia, Yun-lei 1 ; Deng, Yuan-yu 1 ; Zhang, Ai-xiang 1 ; Chen, Huai-gu 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing, Jiangsu, Peoples R China

2.Nanjing Agr Univ, Inst Plant Protect, Nanjing, Jiangsu, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2017 年 12 卷 3 期

页码：

收录情况： SCI

摘要： In China, Fusarium head blight is caused mainly by the Fusarium graminearum species complex (FGSC), which produces trichothecene toxins. The FGSC is divided into three chemotypes: 3-acetyldeoxynivalenol (3-ADON), 15-acetyldeoxynivalenol (15-ADON), and nivalenol (NIV). In order to predict the geographical changes in the distribution of these chemotype populations in major winter wheat-producing areas in China, the biological characteristics of twenty randomly selected isolates from each of the three chemotypes were studied. No significant difference was exhibited in the growth rate of 3-ADON, 15-ADON, and NIV isolates at 15(degrees)C. At 20(degrees)C and 25(degrees)C, the growth rate of 15-ADON isolates was the highest. At 30(degrees)C, the growth rate of NIV and 3-ADON isolates was significantly higher than that of 15-ADON isolates. The 15-ADON isolates produced the highest quantities of perithe-cia and two to three days earlier than the other two populations at each temperature, and released more ascospores at 18(degrees)C. The aggressivenes s test on wheat seedlings and ears indicated there was no significant difference between the 3-ADON and 15-ADON isolates. However, the aggressiveness of NIV isolates was significantly lower than that of the 3-ADON and 15-ADON isolates. The DON content in grains from heads inoculated with the 3-ADON isolates was higher than the content of 15-ADON and NIV isolates. The results showed that 15-ADON population had the advantage in perithecia formation and ascospore release, and the 3-ADON population produced more DON in wheat grains. We suggested that distribution of these three chemotype populations may be related to these biological characteristics.

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