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Procymidone Application Contributes to Multidrug Resistance of Botrytis cinerea

文献类型： 外文期刊

作者： Wu, Zhaochen 1 ; Yu, Chuxian 1 ; Bi, Qiuyan 2 ; Zhang, Junting 1 ; Hao, Jianjun 3 ; Liu, Pengfei 1 ; Liu, Xili 1 ;

作者机构： 1.China Agr Univ, Dept Plant Pathol, Beijing 100193, Peoples R China

2.Minist Agr, Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Baoding 071000, Peoples R China

3.Univ Maine, Sch Food & Agr, Orono, ME 04469 USA

关键词： transcription; multidrug resistance; single-point mutations; molecular docking

期刊名称：JOURNAL OF FUNGI （ 影响因子：4.7； 五年影响因子：5.2 ）

ISSN：

年卷期： 2024 年 10 卷 4 期

页码：

收录情况： SCI

摘要： The necrotrophic pathogen Botrytis cinerea infects a broad range of plant hosts and causes substantial economic losses to many crops. Although resistance to procymidone has been observed in the field, it remains uncertain why procymidone is usually involved in multidrug resistance (MDR) together with other fungicides. Nine mutants derived from the B. cinerea strain B05.10 through procymidone domestication exhibited high resistance factors (RFs) against both procymidone and fludioxonil. However, the fitness of the mutants was reduced compared to their parental strain, showing non-sporulation and moderate virulence. Furthermore, the RFs of these mutants to other fungicides, such as azoxystrobin, fluazinam, difenoconazole, and pyrimethanil, ranged from 10 to 151, indicating the occurrence of MDR. Transcriptive expression analysis using the quantitative polymerase chain reaction (qPCR) revealed that the mutants overexpressed ABC transporter genes, ranging from 2 to 93.7-fold. These mutants carried single-point mutations W647X, R96X, and Q751X within BcBos1 by DNA sequencing. These alterations in BcBos1 conferred resistance to procymidone and other fungicides in the mutants. Molecular docking analysis suggested distinct interactions between procymidone and Bos1 in the B. cinerea standard strain B05.10 or the resistant mutants, suggesting a higher affinity of the former towards binding with the fungicide. This study provides a comprehensive understanding of the biological characteristics of the resistant mutants and conducts an initial investigation into its fungicide resistance traits, providing a reference for understanding the causes of multidrug resistance of B. cinerea in the field.

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