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Stomata as a Defence Nexus: Integrating Drought and Pathogen Stress Signalling.

Zhixin Liu1, Luyao Kong1, Lulu Yan1

  • 1National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, State Key Laboratory of Crop Stress Adaptation and Improvement, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng, Henan, China.

Plant, Cell & Environment
|April 15, 2026
PubMed
Summary

Plant stomata coordinate responses to drought and pathogen invasion through complex signaling. Understanding these dual roles is key to engineering crops for climate change resilience.

Keywords:
MAP kinase cascadesabscisic acidcrop resiliencedrought‐pathogen interactionhormone crosstalkstomatal immunitysynthetic biology

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Environmental Science

Background:

  • Plant stomata are crucial pores regulating gas exchange and plant defense.
  • Stomata act as entry points for pathogens and sensors for environmental stresses like drought.
  • Understanding stomatal responses to combined stresses is vital for crop resilience.

Purpose of the Study:

  • To synthesize current knowledge on stomatal dual roles in defense against pathogens and drought.
  • To highlight mechanisms governing stomatal dynamics under combined environmental pressures.
  • To identify future research directions for enhancing crop resilience.

Main Methods:

  • Review of existing literature on plant stomata, stress signaling, and immunity.
  • Analysis of synergistic and antagonistic mechanisms in stomatal responses.
  • Discussion of advanced techniques like single-cell sequencing and synthetic biology.

Main Results:

  • Stomata integrate diverse stress signals via complex signaling networks (MAPK cascades, ROS, Ca2+, peptides).
  • Crosstalk exists between abscisic acid-mediated drought responses and PAMP-triggered immunity.
  • Drought can create pathogen-favorable conditions, while pathogens affect stomatal development.

Conclusions:

  • Stomata are central hubs for environmental adaptation, integrating drought and pathogen defense.
  • Engineering optimized stomatal responses can enhance crop tolerance to combined stresses.
  • Further research is needed on defense-growth trade-offs and signaling interference for climate change adaptation.