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Related Experiment Videos

Systemic signaling in the wound response.

Anthony L Schilmiller1, Gregg A Howe

  • 1Department of Energy - Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA.

Current Opinion in Plant Biology
|June 9, 2005
PubMed
Summary

Plant wound responses involve long-distance signaling. Jasmonic acid (JA) is crucial, acting as a mobile signal and requiring perception in remote tissues for systemic defense against herbivores.

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Area of Science:

  • Plant biology
  • Plant defense mechanisms
  • Molecular signaling

Background:

  • Localized tissue damage in plants triggers systemic defense responses against herbivores.
  • Understanding long-distance signaling is key to these plant defense mechanisms.
  • Mutant identification has aided research into systemic defense signaling.

Purpose of the Study:

  • To investigate the role of jasmonic acid (JA) in long-distance signaling for plant defense.
  • To understand the requirements for systemic defense responses following wounding.
  • To explore the function of systemin in plant defense signaling.

Main Methods:

  • Grafting experiments with various tomato mutants.
  • Analysis of jasmonic acid (JA) biosynthesis and perception.

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  • Investigation of peptide signaling pathways.

    • Main Results:

    • Systemic signaling necessitates JA biosynthesis at the wound site and perception in distant tissues.
    • Jasmonic acid (JA) is hypothesized to be a mobile wound signal.
    • Systemin amplifies JA production in vascular tissues, promoting long-distance defenses.

    Conclusions:

    • Jasmonic acid (JA) plays a central role in mediating systemic plant defense responses.
    • Both JA production and perception are essential for effective long-distance signaling.
    • Systemin acts upstream to enhance JA-mediated defense amplification.