Sterol 14 alpha-Demethylase CaCYP51A and CaCYP51B are Functionally Redundant, but Differentially Regulated in Colletotrichum acutatum: Responsibility for DMI-Fungicide Resistance
文献类型： 外文期刊
作者： Wei, Lingling 1 ; Li, Xiujuan 1 ; Chen, Bin 1 ; Chen, Wenchan 2 ; Wei, Lihui 2 ; Zhou, Dongmei 2 ; Chen, Changjun 1 ; Wu, Chengdong 3 ;
作者机构： 1.Nanjing Agr Univ, Coll Plant Protect, Nanjing 210095, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210095, Jiangsu, Peoples R China
3.Nanjing Pukou Dist Agr Technol Extens Ctr, Nanjing 211800, Jiangsu, Peoples R China
关键词： anthracnose; Colletotrichum acutatum; tebuconazole; resistance mechanism; CaCYP51 genes
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.895； 五年影响因子：6.048 ）
ISSN： 0021-8561
年卷期：
页码：
收录情况： SCI
摘要： Colletotrichum acutatum, the main pathogen causing anthracnose on chili worldwide, is controlled by tebuconazole [a sterol C14-demethylation inhibitor (DMI) fungicide, abbreviated as Teb] with excellent efficacy. Our previous study exhibited that all C. acutatum isolates were sensitive to Teb while the Colletotrichum gloeosporioides population had developed resistance to Teb on the same fungicide-pressure selection. Therefore, the assessment of Teb-resistance in C. acutatum is impending. Twenty Tebresistant (Teb) mutants obtained by fungicide domestication and ultraviolet (UV)-mutagenesis displayed similar fitness compared to parental isolates. Data in the current study exhibited that mutations at CaCYP51A and/or overexpression of CaCYP51s were responsible for Teb-resistance. Furthermore, the deletion mutants Delta CaCYP51A and Delta CaCYP51B played different roles in sensitivities to DMIs. Taken together, this study first reported that mutations at CaCYP51A and/or overexpression of CaCYP51s conferred resistance to Teb in C. acutatum, CaCYP51A and CaCYP51B are functionally redundant, but differentially regulated in DMI resistance.
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