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Related Experiment Video

Updated: Jul 19, 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

Effector-triggered immunity by the plant pathogen Phytophthora.

Dinah Qutob¹, Jennifer Tedman-Jones, Mark Gijzen

¹Agriculture and Agri-Food Canada, 1391 Sandford Street, London, Ontario N5V 4T3, Canada. qutobd@agr.gc.ca

Trends in Microbiology

|September 26, 2006

Summary

A novel avirulence gene locus, Avr3b-Avr10-Avr11, was identified in potato late blight pathogen Phytophthora infestans. This locus, encoding a WD40 protein, is recognized by multiple potato resistance genes.

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Identification of Post-translational Modifications of Plant Protein Complexes

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Published on: February 22, 2014

Area of Science:

Plant Pathology
Genetics
Molecular Biology

Background:

Potato late blight, caused by Phytophthora infestans, is a devastating disease.
Understanding pathogen avirulence mechanisms is crucial for developing durable resistance in crops.

Purpose of the Study:

To identify and characterize novel avirulence (Avr) genes in Phytophthora infestans.
To investigate the genetic basis of pathogen recognition by potato resistance (R) genes.

Main Methods:

Genetic mapping and sequencing to identify the avirulence locus.
Bioinformatic analysis of the encoded protein structure and function.
Comparative analysis of the locus in different pathogen strains.

Main Results:

Discovery of the Avr3b-Avr10-Avr11 locus, distinct from previously identified Avr loci.
The locus encodes a large protein with a WD40 domain, showing similarity to transcription factors.
Gene amplification leading to truncated copies is characteristic of avirulent P. infestans strains.

Conclusions:

The Avr3b-Avr10-Avr11 locus represents a new target for potato R genes.
Understanding this locus provides insights into pathogen evolution and host-pathogen interactions.
This discovery aids in breeding potato varieties with enhanced resistance to late blight.