Plant cell walls as a key driver of plant-pathogen coevolution
Cristian Carrasco-López1, Sergio López-Cobos1,2, Andrea Sánchez-Vallet1
1Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria/Consejo Superior de Investigaciones Científicas (INIA/CSIC), Campus de Montegancedo UPM, 28223 Pozuelo de Alarcón, Madrid, Spain.
FEMS Microbiology Reviews
|May 15, 2026
Summary
Plant cell walls are key in plant-pathogen interactions, acting as a battleground where pathogens attack and plants defend. This review explores how cell walls influence plant immunity and pathogen virulence in their co-evolutionary arms race.
Area of Science:
- Plant Pathology
- Molecular Plant-Microbe Interactions
- Plant Cell Wall Biology
Background:
- Plant cell walls are central to plant-pathogen interactions, serving as the initial barrier against pathogen invasion.
- Pathogens utilize hydrolytic enzymes to degrade cell walls, while plants possess mechanisms to detect cell wall damage and initiate defense responses.
- The co-evolutionary relationship between plants and pathogens involves continuous adaptation, with pathogens evolving to overcome host defenses and plants developing counter-strategies.
Purpose of the Study:
- To expand the classical molecular arms race model by integrating the role of plant cell walls.
- To elucidate the contribution of plant cell walls to plant immunity against pathogens.
- To analyze the impact of plant cell walls on filamentous pathogen virulence.
Main Methods:
- Literature review and synthesis of existing research on plant cell walls, plant immunity, and pathogen virulence.
- Analysis of the molecular mechanisms underlying plant cell wall degradation by pathogens.
- Examination of plant perception and response to cell wall damage.
Main Results:
- Plant cell walls are not merely structural components but active participants in plant defense signaling.
- Pathogen strategies to breach cell walls are constantly countered by plant resistance mechanisms, highlighting a dynamic molecular arms race.
- The structural integrity and composition of plant cell walls significantly influence the outcome of plant-pathogen interactions and disease progression.
Conclusions:
- Plant cell walls are critical determinants of disease outcome, playing a pivotal role in both plant immunity and pathogen virulence.
- The classical arms race model is enhanced by recognizing the multifaceted contribution of plant cell walls in host-pathogen dynamics.
- Further research into cell wall-mediated immunity and pathogen strategies can lead to novel approaches for crop protection.
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