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Fusarium fujikuroi Species Complex Associated With Rice, Maize, and Soybean From Jiangsu Province, China: Phylogenetic, Pathogenic, and Toxigenic Analysis

文献类型： 外文期刊

作者： Qiu, Jianbo 1 ; Lu, Yunan 5 ; He, Dan 1 ; Lee, Yin-Won 6 ; Ji, Fang 1 ; Xu, Jianhong 1 ; Shi, Jianrong 1 ;

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

2.Minist Agr & Rural Affairs, Key Lab Control Technol & Stand Agroprod Safety &, Nanjing 210014, Peoples R China

3.Collaborat Innovat Ctr Modern Grain Circulat & Sa, Nanjing 210014, Peoples R China

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

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

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

7.Univ KwaZulu Natal, Sch Life Sci, Microbiol Discipline, Westville Campus, Durban, South Africa

8.Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang 212013, Jiangsu, Peoples R China

关键词： cereal; Gibberella fujikuroi species complex; pathogenicity; phylogence; toxigenicity

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： Species belonging to the Fusarium fujikuroi species complex (FFSC) are of vital importance and are a major concern for food quantity and quality worldwide, as they not only cause serious diseases in crops but also produce various mycotoxins. To characterize the population structure and evaluate the risk of poisonous secondary metabolites, a total of 237 candidate strains were isolated from rice, maize, and soybean samples in Jiangsu Province, China. Species identification of the individual strain was accomplished by sequencing the translation elongation factor la gene (TEF-1 alpha) and the fumonisin (FB) synthetic gene (FUM1). The distribution of Fusarium species among the different crops was observed. The maize seeds were dominated by F. proliferatum (teleomorph, Gibberella intermedia) and F. verticillioides (teleomorph, G. moniliformis), whereas F. fujikuroi (teleomorph, G. fujikuroi) was the most frequently isolated species from rice and soybean samples. In addition, phylogenetic analyses of these strains were performed, and the results suggested clear groups showing no obvious relationship with the origin source. FFSC species pathogenicity and toxigenicity were studied. All of the species reduced the rice seed germination rate, with no significant differences. F. fujikuroi showed two distinct patterns of influencing the length of rice seedlings, which were correlated with FBs and gibberellic acid synthesis. FBs were mainly produced by F. verticillioides and F. proliferatum. F. proliferatum and F. fujikuroi also produced moniliformin and beauvericin. The toxigenicity of F. andiyazi (teleomorph, G. andiyazi) was extremely low. Further analysis indicated that the sequence variations in TEF-1 alpha and the differences in the expression levels of the toxin synthesis genes were associated with the diversity of secondary metabolites in F. fujikuroi strains. These findings provide insight into the population-level characterization of the FFSC and might be helpful in the development of strategies for the management of diseases and mycotoxins.

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