Analysis of Fusarium graminearum Species Complex from Freshly Harvested Rice in Jiangsu Province (China)

文献类型： 外文期刊

第一作者： Dong, Fei

作者： Dong, Fei;Zhang, Xiao;Xu, Jian Hong;Shi, Jian Rong;Dong, Fei;Shi, Jian Rong;Mokoena, Mduduzi P.;Olaniran, Ademola O.;Lee, Yin-Won;Chen, Xin Yuan;Li, Yun Peng

作者机构：

关键词： biological characteristics; Fusarium graminearum species complex; pathogenicity; trichothecene chemotype

期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）

ISSN： 0191-2917

年卷期： 2020 年 104 卷 8 期

页码：

收录情况： SCI

摘要： Members of Fusarium graminearum species complex (FGSC) are the major pathogens that cause Fusarium head blight (FHB) in cereals worldwide. Symptoms of FHB on rice, including dark staining or browning of rice glumes, were recently observed in Jiangsu Province, China. To improve our understanding of the pathogens involved, 201 FGSC isolates were obtained from freshly harvested rice samples and identified by phylogenetic analyses. Among the 201 FGSC isolates, 196 were F. asiaticum and the remaining 5 were F. graminearum. Trichothecene chemotype and chemical analyses showed that 68.4% of the F. asiaticum isolates were the 3-acetyldeoxynivalenol (3ADON) chemotype and the remainder were the nivalenol (NIV) chemotype. All of the F. graminearum isolates were the 15-acetyldeoxynivalenol chemotype. Pathogenicity assays showed that both the 3ADON and NIV chemotypes of F. asiaticum could infect wheat and rice spikes. FHB severity and trichothecene toxin analysis revealed that F. asiaticum with the NIV chemotype was less aggressive than that with the 3ADON chemotype in wheat, while the NIV-producing strains were more virulent than the 3ADON-producing strains in rice. F. asiaticum isolates with different chemotypes did not show significant differences in mycelial growth, sporulation, conidial dimensions, or perithecial production. These findings would provide useful information for developing management strategies for the control of FHB in China.

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