生物技术通报 ›› 2025, Vol. 41 ›› Issue (12): 342-350.doi: 10.13560/j.cnki.biotech.bull.1985.2025-0543

• 研究报告 • 上一篇    下一篇

bZIP转录因子CsFcr3调控暹罗炭疽菌对DMI和QoI类杀菌剂敏感性的功能研究

杨洪1,3(), 张超2, 薛雯轩1, 黄韦媛1, 林春花3(), 王立丰1()   

  1. 1.农业农村部橡胶树生物学与遗传资源利用重点实验室 省部共建国家重点实验室培育基地-海南省热带作物栽培生理学重点实验室 中国热带农业科学院橡胶研究所,海口 571101
    2.宜春市科学院,宜春 336028
    3.海南大学热带农林学院(农业农村学院、乡村振兴学院),儋州 571737
  • 收稿日期:2025-05-26 出版日期:2025-12-26 发布日期:2026-01-06
  • 通讯作者: 林春花,女,博士,教授,研究方向 :植物病理学;E-mail: lin3286320@hainanu.edu.com
    王立丰,男,博士,研究员,研究方向 :橡胶树生理学;E-mail: lfwang@catas.cn
  • 作者简介:杨洪,男,副研究员,研究方向 :橡胶树病理学;E-mail: yang_hong0317@126.com
  • 基金资助:
    海南省“南海新星”科技创新人才平台项目(NHXXRCXM202329);海南省自然科学基金面上项目(323MS078)

Functional Study of bZIP Transcription Factor CsFcr3 in Regulating the Sensitivity of Colletotrichum siamense to DMI and QoI Fungicides

YANG Hong1,3(), ZHANG Chao2, XUE Wen-xuan1, HUANG Wei-yuan1, LIN Chun-hua3(), WANG Li-feng1()   

  1. 1.Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs/State Key Laboratory Incubation Base for Cultivation & Physiology of Tropical Crops/Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101
    2.Yichun Academy of Sciences, Yichun 336028
    3.College of Tropical Agriculture and Forestry, Hainan University, Danzhou 571737
  • Received:2025-05-26 Published:2025-12-26 Online:2026-01-06

摘要:

目的 从我国橡胶树炭疽病的田间优势菌暹罗炭疽菌(Colletotrichum siamense)中克隆bZIP转录因子CsFcr3,明确其序列和结构特征,分析CsFcr3在暹罗炭疽菌对6种不同类型杀菌剂敏感性中的生物学功能,为深入研究病原真菌耐药性调控机制奠定基础。 方法 采用同源克隆从C. siamense中克隆了bZIP转录因子CsFcr3,并进行序列及结构特征分析,利用实时荧光定量PCR(RT-qPCR)分析杀菌剂胁迫下CsFcr3的表达模式;利用同源重组和PEG介导的原生质体转化技术对CsFcr3进行基因敲除,分析敲除突变体对不同杀菌剂敏感性的变化。 结果 CsFcr3开放阅读框长度为1 101 bp,编码336个氨基酸残基,具有bZIP_Yap保守结构域;RT-qPCR结果表明,DMI类杀菌剂苯醚甲环唑、戊唑醇、咪鲜胺及甲氧基丙烯酸酯(QoI)类杀菌剂吡唑醚菌酯胁迫下CsFcr3均显著上调表达;与野生型菌株相比,CsFcr3基因缺失突变体对氟康唑、戊唑醇和咪鲜胺的敏感性均降低,对吡唑醚菌酯的敏感性增加,而对苯醚甲环唑和咯菌腈的敏感性无显著变化。 结论 从暹罗炭疽菌中克隆得到具有bZIP转录因子典型基序和保守结构域的CsFcr3,且与酿酒酵母Yap3p高度同源。CsFcr3主要参与调控暹罗炭疽菌对DMI类和QoI类杀菌剂的敏感性而不参与菌株对吡咯类杀菌剂敏感性的调控。

关键词: 炭疽病, 暹罗炭疽, 巴西橡胶树, bZIP转录因子, 杀菌剂, 敏感性

Abstract:

Objective The bZIP transcription factor CsFcr3 was cloned from Colletotrichum siamense, the predominant species responsible for Colletotrichum leaf disease (CLD) in rubber trees. This study characterized its sequence and structural features and elucidated its biological role in regulating the sensitivity of C. siamense to six different fungicides. These findings establish a foundational understanding of resistance regulatory mechanisms in pathogenic fungi and provide a theoretical framework for the scientific and efficient management of fungal diseases in rubber tree cultivation. Method The bZIP transcription factor CsFcr3, having high sequence homology with the fluconazole resistance protein Fcr3 from Candida albicans, was cloned from Colletotrichum siamense using homology-based cloning. Comprehensive sequence and structural analyses were conducted to characterize this gene. Real-time quantitative PCR (RT-qPCR) was employed to profile the expression patterns of CsFcr3 under fungicide stress. Additionally, the gene knockout of CsFcr3 was performed by homologous recombination and PEG-mediated protoplast transformation, and the changes in sensitivity of the knockout mutants to different fungicides were analyzed. Result The open reading frame (ORF) of CsFcr3 encompassed 1 101 base pairs, encoding a protein of 336 amino acids with a conserved bZIP_Yap domain. RT-qPCR results demonstrated significant upregulation of CsFcr3 expression under stress induced by demethylation inhibitor (DMI) fungicides (difenoconazole, tebuconazole, prochloraz) and quinone outside inhibitor (QoI) fungicides (pyraclostrobin). Three CsFcr3 knockout mutants (ΔCsFcr3-3, ΔCsFcr3-15, and ΔCsFcr3-16) were successfully generated. Compared to the wild-type strain, the ΔCsFcr3s presented significantly reduced sensitivity to fluconazole, tebuconazole, and prochloraz, increased sensitivity to pyraclostrobin, and no significant differences in sensitivity to difenoconazole and fludioxonil. Conclusion The bZIP transcription factor CsFcr3, which contains conserved motifs and structural domains typical of the bZIP family, is cloned from C. siamense. Phylogenetic analysis reveals its close homology to the Saccharomyces cerevisiae Yap3p protein. Functional characterization demonstrates that CsFcr3 primarily regulates C. siamense sensitivity to DMI and QoI fungicides, exhibiting no significant regulatory role in response to pyrrolnitrin-class fungicides.

Key words: anthracnose, Colletotrichum siamense, Hevea brasiliensis, bZIP transcription factor, fungicide, sensitivity