Point Mutations in FgSdhC(2) or in the 5 ' Untranslated Region of FgSdhC(1) Confer Resistance to a Novel Succinate Dehydrogenase Inhibitor Flubeneteram in Fusarium graminearum

文献类型： 外文期刊

第一作者： Chen, Wenchan

作者： Chen, Wenchan;Wei, Lingling;Li, Xiujuan;Ma, Hongyu;Lou, Tiancheng;Zhang, Pengcheng;Zheng, Huanhuan;Chen, Changjun;Chen, Wenchan;Liu, Fengquan;Zhu, Xiaolei;Yang, Guangfu;Zhang, Yu

作者机构：

关键词： Fusarium graminearum; flubeneteram; 5 ' UTR; mutations; resistance mechanism

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2021 年 69 卷 44 期

页码：

收录情况： SCI

摘要： Fusarium graminearum is one of the phytopathogenic fungi causing cereal fusarium head blight worldwide. Flubeneteram (Flu) is a novel succinate dehydrogenase inhibitor (SDHI) which exhibits strong fungicidal activity against F. graminearum. In this study, four Flu-resistant (FluR) mutants were generated by fungicide domestication from the wildtype strain PH-1. Sequencing alignment results of FgSdh from PH-1 and FluR mutants showed that all the mutations could be categorized into three resistant genotypes. Genotype I had an A-to-T mutation at the -57 bp of the 5' untranslated region (5' UTR) of FgSdhC(1), while genotypes II and III carried nonsynonymous mutations conferring T77I or R86C in FgSdhC(2), respectively. All the mutations conferring the Flu resistance and causing fitness penalty were validated. The genotype I mutant showed high Flu-resistance, while genotype II and III mutants exhibited low Flu resistance. Additionally, all the FluR genotypes showed distinct cross-resistance patterns among the five SDHIs.

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