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Updated: Jun 16, 2025

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Quorum Signaling Molecules: Interactions Between Plants and Associated Pathogens.

Xi Zheng1, Junjie Liu1, Xin Wang1

  • 1State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming 650091, China.

International Journal of Molecular Sciences
|June 13, 2025
PubMed
Summary

Plants interact with soil microbes via chemical signals called quorum sensing (QS). This review explores how plants detect and use these microbial signals to manage their own defenses and the microbiome for sustainable agriculture.

Keywords:
AHLQQascarosidesfarnesolinhibitorsplant defensequorum sensing

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Area of Science:

  • Plant science
  • Microbiology
  • Ecology

Background:

  • Plant development and immunity are influenced by soil microbial communities and their chemical communication.
  • Quorum sensing (QS) is a microbial signaling mechanism affecting bacterial traits like virulence and biofilm formation, impacting plant-microbe interactions.
  • Plants can detect and manipulate microbial QS signals, creating bidirectional communication influencing plant physiology and microbiome balance.

Purpose of the Study:

  • To systematically review quorum sensing (QS) signals from bacteria, fungi, and nematodes.
  • To examine plant recognition of these QS signals, downstream pathways, and defense activation.
  • To highlight the role of fungal and nematode QS molecules in modulating plant-microbe interactions and their agricultural applications.

Main Methods:

  • Literature review of existing research on microbial quorum sensing and plant-microbe communication.
  • Systematic examination of QS signals from diverse microbial sources (bacteria, fungi, nematodes).
  • Analysis of plant receptor-mediated recognition and downstream signaling pathways.

Main Results:

  • Quorum sensing (QS) molecules from bacteria, fungi, and nematodes are recognized by plant receptors.
  • Plant perception of QS signals triggers downstream signaling and activates plant defense responses.
  • Fungal and nematode QS molecules play a significant role in modulating plant-microbe interactions.

Conclusions:

  • Elucidating microbial QS communication networks provides insights into plant physiology and microbiome stability.
  • Understanding these plant-microbe signaling pathways offers potential applications for sustainable agriculture and crop health management.
  • This knowledge can enhance ecosystem resilience by optimizing plant-microbe interactions.