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Related Experiment Video

Updated: Nov 30, 2025

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
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Mobile signals in systemic acquired resistance.

Aardra Kachroo1, Pradeep Kachroo1

  • 1Department of Plant Pathology, University of Kentucky, Lexington, KY, 40546, USA.

Current Opinion in Plant Biology
|November 17, 2020
PubMed
Summary

Plants develop long-distance immunity called systemic acquired resistance (SAR) through mobile signals. This review examines known SAR inducers as potential mobile signals in plant defense pathways.

Area of Science:

  • Plant Pathology
  • Plant Immunity
  • Molecular Plant-Microbe Interactions

Background:

  • Plants exhibit systemic acquired resistance (SAR), a broad-spectrum immunity against pathogens.
  • SAR is triggered by localized infection, involving mobile signals that prime distal tissues.
  • Understanding SAR signaling is crucial for enhancing plant defense mechanisms.

Purpose of the Study:

  • To review potential candidates for mobile signals in SAR.
  • To evaluate known SAR inducers based on historical SAR signal knowledge.
  • To integrate recent advances in SAR signaling pathways.

Main Methods:

  • Literature review of historical SAR research.
  • Analysis of recent findings on SAR signaling pathways.

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  • Evaluation of identified SAR-inducing chemicals as mobile signals.

    • Main Results:

    • Several SAR-inducing chemicals have been identified as potential mobile signals.
    • Many SAR inducers operate in a bifurcate pathway, essential for SAR induction.
    • The review synthesizes evidence supporting or refuting candidate mobile signals.

    Conclusions:

    • Known SAR inducers are evaluated for their candidacy as mobile signals.
    • The review highlights the importance of both branches in a bifurcate SAR pathway.
    • Further research is needed to definitively identify SAR mobile signals.