植物学报 ›› 2025, Vol. 60 ›› Issue (5): 816-830.DOI: 10.11983/CBB24135  cstr: 32102.14.CBB24135

• 研究论文 • 上一篇    下一篇

棉花抗黄萎病相关基因GhDIR1的生物学功能分析

黄雨欣1, 谢涛2, 王省芬3, 郭惠明2, 程红梅2, 马伯军1, 陈析丰1,*(), 苏晓峰2,*()   

  1. 1浙江师范大学生命科学学院, 金华 321004
    2中国农业科学院生物技术研究所农业微生物资源发掘与利用全国重点实验室, 北京 100081
    3河北农业大学农学院, 保定 071000
  • 收稿日期:2024-09-04 接受日期:2024-10-30 出版日期:2025-09-10 发布日期:2024-11-15
  • 通讯作者: *E-mail: xfchen@zjnu.cn; suxiaofeng@caas.cn
  • 作者简介:中国农业科学院生物技术研究所微生物智能设计与合成创新团队程红梅课题组, 长期致力于作物黄萎病综合防治及新型基因编辑器在棉花中的评估和应用研究。近年来, 该课题组成功建立了病原菌精准监测预警方法, 系统解析了病原菌致病力、植物防御反应和环境微生物三者之间的互作机制, 从而利用合成生物学及纳米技术进行作物黄萎病的综合防治。课题组先后主持国家转基因重大专项、973计划、国家自然科学基金、公益性行业科技专项和国家重点研发等项目。在Nature CommunicationsPlant Biotechnology JournalChemical Engineering JournalInternational Journal of Biological Macromolecules等国际知名及中文核心期刊上发表论文80余篇。获国家发明专利授权20余项, 为作物黄萎病的综合防控相关研究做出了重要贡献
  • 基金资助:
    农业生物育种重大项目(2023ZD04039);浙江省自然科学基金(LZ23C130004);河北省重点研发计划(21326314D)

Functional Verification of GhDIR1 Gene Against Verticillium Wilt in Cotton

Huang Yuxin1, Xie Tao2, Wang Xingfen3, Guo Huiming2, Cheng Hongmei2, Ma Bojun1, Chen Xifeng1,*(), Su Xiaofeng2,*()   

  1. 1College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China
    2National Key Laboratory of Agricultural Microbiology, Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    3College of Agriculture, Hebei Agricultural University, Baoding 071000, China
  • Received:2024-09-04 Accepted:2024-10-30 Online:2025-09-10 Published:2024-11-15
  • Contact: *E-mail: xfchen@zjnu.cn; suxiaofeng@caas.cn

摘要: 由大丽轮枝菌(Verticillium dahliae)引起的黄萎病是棉花(Gossypium hirsutum)生产中最主要的威胁之一, 其可导致棉花大幅减产和纤维品质严重下降。前期对接种大丽轮枝菌的拟南芥(Arabidopsis thaliana)进行转录组分析, 表明DIR1类蛋白基因AT3G53980.2受病原菌强烈诱导表达。该研究发现, 棉花脂质转移蛋白编码基因GhDIR1 (Gh_A09G180700.1)与AT3G53980.2表现出高度的同源性。生物信息学分析表明, GhDIR1开放阅读框(ORF)为351 bp, 编码116个氨基酸残基。亚细胞定位结果显示GhDIR1定位于细胞膜。分析GhDIR1在大丽轮枝菌V991侵染后的表达模式, 发现其能快速响应大丽轮枝菌侵染。利用病毒诱导的基因沉默(VIGS)技术下调该基因表达后, 棉花对黄萎病菌的抗性显著降低。野生型和GhDIR1沉默植株转录组测序结果表明, 差异表达基因主要在类黄酮生物合成、倍半萜和三萜生物合成以及α-亚麻酸代谢3个途径富集; 同时, 荧光定量PCR结果表明, 3个途径中的6个关键基因(GhCHSGhDFRGhCADGhSEQGhLOXGhAOC)在GhDIR1沉默植株中均下调表达, 与转录组数据一致。推测GhDIR1可能通过介导类黄酮和萜类化合物的合成途径, 并调节茉莉酸(JA)等植物激素的次级代谢来激活相关信号通路, 进而影响植株抗病性。综上, GhDIR1作为棉花抗黄萎病的正向调控因子, 通过参与多种激素和抗病信号网络调控植物的免疫反应。

关键词: 陆地棉, 棉花黄萎病, GhDIR1, 病毒诱导的基因沉默, 转录组分析

Abstract: INTRODUCTION: Verticillium wilt (VW), caused by Verticillium dahliae, severely reduces cotton yield and fiber quality. Previous transcriptomic analysis in V. dahliae-inoculated Arabidopsis thaliana identified the pathogen-induced DIR1-like gene AT3G53980.2. In cotton, we discovered a homologous gene, GhDIR1 (Gh_A09G180700.1), encoding a lipid transfer protein. This study investigates its role in cotton resistance to V. dahliae. RATIONALE: We characterized GhDIR1’s molecular features, expression patterns under pathogen stress, and functional impact using bioinformatics, subcellular localization, qRT-PCR, and virus-induced gene silencing (VIGS) analyses. Transcriptomic analysis of wild-type and GhDIR1-silenced plants were conducted to unravel downstream regulatory networks, focusing on metabolic pathways linked to plant immunity. RESULTS: The results showed that GhDIR1 contains a 351 bp ORF encoding 116 amino acids. Subcellular localization confirmed its presence on the cell membrane. qRT-PCR showed rapid induction of GhDIR1 by V. dahliae. Silencing GhDIR1 increased cotton susceptibility to the pathogen. Transcriptomic data revealed that differentially expressed genes in silenced plants were enriched in flavonoid biosynthesis, sesquiterpene/triterpene biosynthesis, and α-linolenic acid metabolism. Key genes (GhCHS, GhDFR, GhCAD, GhSEQ, GhLOX, and GhAOC) in these pathways were downregulated, suggesting impaired synthesis of protective metabolites. CONCLUSION: It is speculated that GhDIR1 positively regulates cotton resistance to VW by modulating flavonoid and terpenoid biosynthesis and jasmonic acid-related signaling. Its silencing disrupts critical defense pathways, highlighting its role in coordinating immune responses. These findings propose GhDIR1 as a potential target for enhancing disease resistance in cotton.

The induced expression pattern of GhDIR1 and related genes after inoculation with Verticillium dahliae.

Key words: Gossypium hirsutum, cotton Verticillium wilt, GhDIR1, virus-induced gene silencing, transcriptome analysis