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Gramineous weeds near paddy fields are alternative hosts for the Fusarium graminearum species complex that causes fusarium head blight in rice

文献类型： 外文期刊

作者： Dong, Fei 1 ; Xu, Jianhong 1 ; Zhang, Xiao 1 ; Wang, Shufang 1 ; Xing, Yujun 1 ; Mokoena, Mduduzi P. 6 ; Olaniran, Ade 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Minist Sci & Technol, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base, Nanjing 210014, Peoples R China

2.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Control Technol & Standard Agroprod Safet, Nanjing 210014, Peoples R China

3.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Agroprod Safety Risk Evaluat Nanjing, Nanjing 210014, Peoples R China

4.Jiangsu Acad Agr Sci, Collaborat Innovat Ctr Modern Grain Circulat & Sa, Nanjing 210014, Peoples R China

5.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, Nanjing 210014, Peoples R China

6.Univ KwaZulu, Sch Life Sci, Durban, South Africa

7.Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang, Peoples R China

关键词： Fusarium asiaticum; pathogenicity; trichothecenes; weed

期刊名称：PLANT PATHOLOGY （ 影响因子：2.59； 五年影响因子：2.924 ）

ISSN： 0032-0862

年卷期： 2020 年 69 卷 3 期

页码：

收录情况： SCI

摘要： The objective of this study was to evaluate the potential role of gramineous weeds present near paddy fields as alternative hosts for the Fusarium graminearum species complex (FGSC) that causes fusarium head blight (FHB) in rice. A total of 142 weed samples were collected from 10 gramineous weed species near paddy fields from August to October 2018 in Jiangsu Province, China. Of the 145 isolates of seven Fusarium species isolated from the weed samples, F. asiaticum was the most abundant (86.9%), followed by F. fujikuroi (5.5%), F. proliferatum (2.8%), F. graminearum (2.1%), F. tricinctum (1.4%), F. acuminatum (0.7%), and F. sporotrichioides (0.7%). Genotype and mycotoxin analyses confirmed that 72.2% of F. asiaticum isolates were producers of deoxynivalenol (DON) with 3-acetyl deoxynivalenol (3ADON), and the remainder were nivalenol (NIV) producers. Pathogenicity assays showed that both 3ADON and NIV chemotypes of F. asiaticum could cause FHB in rice, but NIV chemotypes were significantly (p < .05) more aggressive than 3ADON chemotypes. Three Fusarium mycotoxins, DON, NIV, and zearalenone, occurred naturally at low concentrations in the weed samples. Taken together, this study provides insight into the mycotoxin production and aggressiveness of F. asiaticum isolates from gramineous weeds in China.

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