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Related Experiment Video

Updated: Mar 9, 2026

Enteric Bacterial Invasion Of Intestinal Epithelial Cells In Vitro Is Dramatically Enhanced Using a Vertical Diffusion Chamber Model
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JAZ2 controls stomata dynamics during bacterial invasion.

Selena Gimenez-Ibanez1, Marta Boter1, Andrés Ortigosa1

  • 1Plant Molecular Genetics Department, Centro Nacional de Biotecnología-CSIC (CNB-CSIC), Madrid, 28049, Spain.

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|December 23, 2016
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Summary

Coronatine (COR) hijacks a plant immune pathway involving JAZ2 to open stomata for bacterial entry. Targeting this COI1-JAZ2 module offers crop protection against specific pathogens without harming defenses against others.

Keywords:
ANACPseudomonas syringaeJAZ repressorsMYC transcription factorscoronatine (COR)crop protectionpathogenesisstomata

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Area of Science:

  • Plant Pathology
  • Molecular Plant-Microbe Interactions
  • Plant Immunity

Background:

  • Coronatine (COR) is a bacterial toxin that promotes pathogen invasion by opening plant stomata.
  • The precise signaling mechanisms by which COR manipulates stomatal opening are not fully understood.

Purpose of the Study:

  • To elucidate the role of Jasmonate signaling in COR-mediated stomatal opening and bacterial pathogenesis.
  • To identify key regulatory modules controlling stomatal aperture during plant-pathogen interactions.

Main Methods:

  • Analysis of Arabidopsis thaliana JAZ gene expression patterns.
  • Assessment of stomatal opening and closing dynamics in response to COR and pathogens.
  • Evaluation of plant resistance to bacterial pathogens in various loss- and gain-of-function mutants.

Main Results:

  • Constitutive expression of JAZ2 in guard cells modulates stomatal dynamics during bacterial invasion.
  • Arabidopsis jaz2 mutants exhibit impaired stomatal closing and increased susceptibility to Pseudomonas.
  • Gain-of-function jaz2 mutants show resistance to COR-induced stomatal reopening and enhanced resistance to bacterial pathogens.
  • A COI1-JAZ2-MYC2,3,4-ANAC19,55,72 module regulates stomatal aperture, which is exploited by COR.

Conclusions:

  • The COI1-JAZ2-MYC pathway is a critical target for bacterial virulence effectors like COR.
  • Targeting this module provides a strategy for enhancing resistance to biotrophic pathogens without compromising resistance to necrotrophic pathogens.