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

文献类型： 外文期刊

作者： Dong, Fei 1 ; Zhang, Xiao 1 ; Xu, Jian Hong 1 ; Shi, Jian Rong 1 ; Lee, Yin-Won 3 ; Chen, Xin Yuan 4 ; Li, Yun Peng 5 ; M 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Collaborat Innovat Ctr Modern Grain Circulat & Sa, Minist Agr & Rural Affairs,Key Lab Agroprod Safet, Minist Sci & Technol,Key Lab Control Technol & St, Nanjing 210014, Peoples R China

2.Univ KwaZulu Natal, Sch Life Sci, X54001, Durban, South Africa

3.Seoul Natl Univ, Dept Agr Biotechnol, Seoul 08826, South Korea

4.Jiangsu Ocean Univ, Coll Marine Life & Fisheries, Lianyungang 222005, Peoples R China

5.Xinxiang Med Univ, Sanquan Coll, Xinxiang 453003, Henan, Peoples R China

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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