J Integr Plant Biol.

• Research Article •    

SCFSlRAE1 regulates tomato resistance to Botrytis cinerea by modulating SlWRKY1 stability

Xuewei Wang1,2†, Ming Gao1†, Hongxin Li1, Congyang Jia1, Yiran Wang1, Xianting Lei1, Peng Yang3, Na Zhang1,2* and Yang‐Dong Guo1,2*   

  1. 1. College of Horticulture, China Agricultural University, Beijing 100193, China
    2. Sanya Institute of China Agricultural University, Sanya 572000, China
    3. Nanchong Academy of Agricultural Sciences, Nanchong 637000, China

    The first two authors contributed equally to this work.
    *Correspondences: Na Zhang (zhangna_cau@163.com); Yang‐Dong Guo (yaguo@cau.edu.cn, Dr. Zhang is fully responsible for the distribution of all materials associated with this article)
  • Received:2025-02-10 Accepted:2025-04-13 Online:2025-05-16
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (32172599), the Beijing Rural Revitalization Agricultural Science and Technology Project (NY2401080000), and the Beijing Agriculture Innovation Consortium (BAIC01‐2025)

Abstract: Ubiquitination, a critical post-translational modification, plays a pivotal role in fine tuning the immune responses of plants. The tomato (Solanum lycopersicum) suffers significant yield and quality losses caused by the devastating pathogen Botrytis cinerea. We have discovered the role of SlRAE1, a gene encoding an E3 ubiquitin ligase, as a pivotal negative regulator of resistance to B. cinerea. SlRAE1 interacts with SlSKP1, a component of the SKP1–Cullin1–F-box (SCF) complex, to modulate the protein stability of the transcription factor SlWRKY1 through the 26S proteasome pathway. SlWRKY1 targets and inhibits the transcription of SlJAZ7, a suppressor of jasmonic acid (JA) signaling, thereby activating the JA-induced defense system and affecting tomato susceptibility to B. cinerea. The resistance enhancement observed with knock-out SlRAE1 was reduced when SlWRKY1 was also knocked out, highlighting SlWRKY1's role in SlRAE1's regulation of tomato defense against B. cinerea. Our findings elucidate the defense mechanism in tomato and suggest that targeting SlRAE1, by modulating SlWRKY1 stability, could help to develop resistant tomato varieties. These insights have broader implications for using gene-editing technologies to enhance crop defense against fungi.

Key words: B. cinerea, E3 ubiquitin ligase, JA signaling, SCF complex, tomato, WRKY

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2022 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22