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Updated: Dec 9, 2025

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Shaping the leaf microbiota: plant-microbe-microbe interactions.

Vasvi Chaudhry1, Paul Runge1,2, Priyamedha Sengupta3

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Plant leaves host diverse microbes, influencing plant immunity and pathogen resistance. Understanding these complex interactions is key for developing beneficial plant probiotics and improving crop protection strategies.

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Area of Science:

  • Plant microbiology
  • Plant-pathogen interactions
  • Microbial ecology

Background:

  • Plant leaves harbor pathogenic and non-pathogenic microbes, forming a complex phyllosphere environment.
  • Microbial colonization requires adaptation to the leaf's properties and environmental conditions.
  • The host immune system's role in non-pathogenic microbial colonization is not well understood.

Purpose of the Study:

  • To investigate the impact of the host immune system on phyllosphere colonization by non-pathogenic microbes.
  • To explore how microbe-microbe interactions shape leaf microbial communities.
  • To understand host-microbe-microbe networks for biotechnological applications.

Main Methods:

  • Investigating plant basal defenses triggered by non-pathogenic microbes.
  • Analyzing species-specific interactions between microbial signals and plant receptors.
  • Studying antagonistic and host manipulation strategies in microbial competitors.

Main Results:

  • Non-pathogenic microbes can prime plant defenses, enhancing resistance to pathogens.
  • Microbial signals are recognized by plant receptors, often in a species-specific manner.
  • Microbe-microbe interactions are crucial for shaping phyllosphere communities.

Conclusions:

  • Host immune responses significantly influence microbial colonization of plant leaves.
  • Understanding these interactions is vital for developing plant-protective probiotics.
  • Further research into host-microbe-microbe networks can advance agricultural biotechnology.