Bacillus cereus NJ01 induces SA- and ABA-mediated immunity against bacterial pathogens through the EDS1-WRKY18 module

Cell Rep. 2024 Apr 23;43(4):113985. doi: 10.1016/j.celrep.2024.113985. Epub 2024 Mar 21.

Abstract

Emerging evidence suggests a beneficial role of rhizobacteria in ameliorating plant disease resistance in an environment-friendly way. In this study, we characterize a rhizobacterium, Bacillus cereus NJ01, that enhances bacterial pathogen resistance in rice and Arabidopsis. Transcriptome analyses show that root inoculation of NJ01 induces the expression of salicylic acid (SA)- and abscisic acid (ABA)-related genes in Arabidopsis leaves. Genetic evidence showed that EDS1, PAD4, and WRKY18 are required for B. cereus NJ01-induced bacterial resistance. An EDS1-PAD4 complex interacts with WRKY18 and enhances its DNA binding activity. WRKY18 directly binds to the W box in the promoter region of the SA biosynthesis gene ICS1 and ABA biosynthesis genes NCED3 and NCED5 and contributes to the NJ01-induced bacterial resistance. Taken together, our findings indicate a role of the EDS1/PAD4-WRKY18 complex in rhizobacteria-induced disease resistance.

Keywords: CP: Plants; EDS1; PAD4; WRKY18; abscisic acid; salicylic acid.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abscisic Acid* / metabolism
  • Arabidopsis Proteins* / genetics
  • Arabidopsis Proteins* / metabolism
  • Arabidopsis* / genetics
  • Arabidopsis* / immunology
  • Arabidopsis* / microbiology
  • Bacillus cereus* / genetics
  • DNA-Binding Proteins* / genetics
  • DNA-Binding Proteins* / metabolism
  • Disease Resistance / genetics
  • Disease Resistance / immunology
  • Gene Expression Regulation, Plant
  • Oryza / genetics
  • Oryza / immunology
  • Oryza / microbiology
  • Plant Diseases* / immunology
  • Plant Diseases* / microbiology
  • Plant Immunity
  • Salicylic Acid* / metabolism
  • Transcription Factors / genetics
  • Transcription Factors / metabolism

Substances

  • Abscisic Acid
  • Arabidopsis Proteins
  • DNA-Binding Proteins
  • Salicylic Acid
  • Transcription Factors
  • EDS1 protein, Arabidopsis