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Pathogen elicitor-induced changes in the maize extracellular matrix proteome.

Stephen Chivasa1, William J Simon, Xiao-Lan Yu

  • 1School of Biological and Biomedical Sciences, University of Durham, South Road, Durham DH1 3LE, UK.

Proteomics
|November 11, 2005
PubMed
Summary

Plant extracellular matrix proteins rapidly change during pathogen attack. This involves altered enzyme activity, new inhibitor secretion, and cytosolic proteins moving to the cell wall, highlighting a complex defense role.

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Area of Science:

  • Plant biology
  • Proteomics
  • Plant defense mechanisms

Background:

  • The plant extracellular matrix (ECM) is crucial for structural integrity and defense.
  • Pathogen attacks trigger complex plant responses, including modifications to the ECM.

Purpose of the Study:

  • To investigate proteomic changes in the maize extracellular matrix during pathogen attack.
  • To understand the role of the ECM in plant defense signaling.

Main Methods:

  • Utilized a maize cell suspension culture system treated with pathogen elicitors.
  • Employed a proteomic approach to analyze changes in ECM proteins.

Main Results:

  • Observed rapid changes in extracellular peroxidase phosphorylation.

Related Experiment Videos

  • Detected the apparent disappearance of beta-N-acetylglucosaminidase and accumulation of a xylanase inhibitor protein.
  • Identified the recruitment of cytosolic proteins (glyceraldehyde-3-phosphate dehydrogenase, heat shock protein fragment) into the cell wall.

    • Conclusions:

    • The ECM plays a multifaceted role in plant defense against pathogens.
    • ECM modifications include enzyme activity changes, novel inhibitor secretion, and cytosolic protein translocation.
    • The ECM is involved in modulating defense signals during pathogen interactions.