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Related Experiment Video

Updated: Jul 16, 2026

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem

Published on: October 1, 2015

Phylogenetic signal in plant pathogen-host range.

Gregory S Gilbert¹, Campbell O Webb

¹Environmental Studies Department, University of California, Santa Cruz, CA 95064, USA. ggilbert@ucsc.edu

Proceedings of the National Academy of Sciences of the United States of America

|March 16, 2007

Summary

Most fungal pathogens infect many plants, but most plants resist specific pathogens. Host range decreases with plant evolutionary relatedness, aiding pathogen risk assessment.

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Area of Science:

Plant pathology
Ecology
Evolutionary biology

Background:

Understanding plant pathogen host specificity is crucial for managing plant diseases.
Most fungal pathogens are polyphagous, yet individual plant species exhibit resistance.

Purpose of the Study:

To investigate the relationship between plant phylogeny and pathogen host range.
To assess the predictability of pathogen host range based on plant evolutionary relatedness.

Main Methods:

Experimental inoculations of tropical rainforest plant leaves with fungal pathogens.
Analysis of host range patterns in relation to plant phylogenetic distance.

Main Results:

A continuous decrease in pathogen infectivity was observed with increasing phylogenetic distance between plant species.
Most plant species in a local community were resistant to any given pathogen.

Conclusions:

Phylogenetic signals in host range can predict pathogen distribution and impact in plant communities.
Community phylogenetic structure significantly influences disease spread and ecological effects.
Current regulatory frameworks may underestimate risks associated with global plant pathogen movement.