Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (10): 3895-3908.DOI: 10.1016/j.jia.2025.06.024

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大白菜对芸苔链格孢防御反应的转录组学分析

  

  • 收稿日期:2024-07-07 修回日期:2025-06-24 接受日期:2025-04-08 出版日期:2025-10-20 发布日期:2025-09-24

Comparative transcriptomic analysis of Chinese cabbage’s defense responses to Alternaria brassicae

Qi Zeng1, Qingguo Sun1, Xinru Hou1, Lin Chen1, Ruixing Zhang1, Xue Bai1, Xifan Liu1, Xiaowu Wang2, Lugang Zhang1, Baohua Li1#   

  1. 1 State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Horticulture, Northwest A&F University, Yangling 712100, China

    2 Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China

  • Received:2024-07-07 Revised:2025-06-24 Accepted:2025-04-08 Online:2025-10-20 Published:2025-09-24
  • About author:Qi Zeng, E-mail: zengqi@nwafu.edu.cn; #Correspondence Baohua Li, E-mail: baohuali@nwafu.edu.cn
  • Supported by:

    This work was supported by the National Key Research and Development Program of China (2022YFF1003003), the National Natural Science Foundation of China (32070333), and the Key Research and Development Program of Yangling Seed Innovative Center (Ylzy-sc-04). 

摘要:

大白菜黑斑病是由芸苔链格孢(Alternaria brassicae)引起的真菌病害,对大白菜造成严重的危害。通过转录组学的分析,我们探讨了大白菜对芸苔链格孢防御反应的分子机制。值得注意的是,我们发现BrERF109在大白菜受到芸苔链格孢侵染后显著上调。通过优化的VIGS技术,在大白菜中沉默BrERF109降低了大白菜对芸苔链格孢的抗病性,而在拟南芥中过表达BrERF109增强了对芸苔链格孢的抗病性。进一步,我们发现在大白菜中沉默BrERF109抑制了吲哚族芥子油苷基因的表达,吲哚族芥子油苷含量显著降低,而在拟南芥中过表达BrERF109增加了吲哚族芥子油苷的含量。进一步研究发现,BrERF109可以直接结合BrIGMT4的启动子,从而促进吲哚族芥子油苷的积累,积极防御芸苔链格孢的侵染。我们的研究揭示了BrERF109-BrIGMT4 调控模块在大白菜防御芸苔链格孢中的作用,并进一步为探索植物与芸苔链格孢的相互作用提供有价值的数据。

Abstract:

Black spot, a fungal disease caused by Alternaria brassicae infection, inflicts severe damage on Chinese cabbage.  Through comparative transcriptomic analysis, this study investigated the molecular mechanisms underlying Chinese cabbage’s defense responses to Abrassicae infection.  Notably, we found that the expression of BrERF109 was induced by Abrassicae infection.  Silencing of BrERF109 by an optimized virus-induced gene silencing (VIGS) assay in Chinese cabbage diminished disease resistance, while BrERF109-overexpression in Arabidopsis enhanced it.  Additionally, BrERF109 silencing in Chinese cabbage suppressed indolic glucosinolates gene expression, substantially reducing indolic glucosinolates levels, whereas BrERF109-overexpression in Arabidopsis promoted their accumulation.  BrERF109 directly interacts with the BrIGMT4 promoter, thereby facilitating indolic glucosinolates accumulation and enhancing defense against Abrassicae.  This study elucidates the BrERF109-BrIGMT4 regulatory module in Chinese cabbage’s defense against Abrassicae infection, while providing valuable data for further investigation of plant–Abrassicae interactions.


Key words: Chinese cabbage , black spot , RNA-seq , BrERF109 , indolic glucosinolates