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

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Systemic signaling during plant defense.

Aardra Kachroo¹, Guillaume P Robin

¹Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, United States. apkach2@uky.edu

Current Opinion in Plant Biology

|July 23, 2013

Summary

Systemic acquired resistance (SAR) primes plants against pathogens via mobile signals. These signals, involving lipid transfer proteins and salicylic acid, rely on the plant cuticle for perception and induce chromatin changes for defense.

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Area of Science:

Plant pathology
Plant immunity
Molecular biology

Background:

Systemic acquired resistance (SAR) is a crucial plant defense mechanism against pathogens.
SAR involves mobile signals that prepare distal tissues for infection.
Understanding SAR signal dynamics is vital for crop protection.

Purpose of the Study:

To review recent advancements in understanding SAR.
To elucidate the mechanisms of SAR signal generation, transport, and perception.
To highlight the role of key molecular components in SAR.

Main Methods:

Literature review of recent findings on SAR.
Analysis of molecular pathways involved in SAR signaling.
Focus on chemical inducers, lipid transfer proteins, and salicylic acid.

Main Results:

SAR involves mobile chemical signals, some linked to lipid transfer-like proteins.
Perception of SAR signals requires an intact plant cuticle.
Salicylic acid and chromatin modifications are central to SAR induction and priming.

Conclusions:

SAR is a complex process involving mobile signals, cuticle-dependent perception, and salicylic acid-mediated priming.
Recent findings deepen our understanding of SAR's molecular underpinnings.
Further research into SAR mechanisms can inform strategies for enhancing plant disease resistance.