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Signalling via plasmodesmata--the neglected pathway

K J Oparka1

  • 1Department of Cellular and Environmental Physiology, Scottish Crop Research Institute, Invergowrie, Dundee, UK.

Seminars in Cell Biology
|April 1, 1993
PubMed
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Plasmodesmata facilitate symplastic transport of small solutes and signaling molecules between plant cells. This review explores their structure, pathways, and regulation for intercellular communication.

Area of Science:

  • Plant Cell Biology
  • Plant Physiology
  • Molecular Biology

Background:

  • Plasmodesmata are crucial for intercellular communication in plants.
  • Understanding symplastic transport is key to plant development and signaling.

Purpose of the Study:

  • To review recent studies on plasmodesmata function in solute and signal conduction.
  • To describe plasmodesmata substructure and transport pathways.
  • To discuss regulation of plasmodesmatal conductance and symplastic domains.

Main Methods:

  • Literature review of recent studies on plasmodesmata.
  • Analysis of plasmodesmata substructure and potential transport pathways.
  • Discussion of regulatory factors and symplastic domains.

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Main Results:

  • Two discrete pathways exist for symplastic transport: the cytoplasmic sleeve and the endoplasmic reticulum.
  • The endoplasmic reticulum forms a dynamic continuum for lipid and lipid-signaling molecule movement.
  • Plasmodesmata conduct hormones, electrical signals, and potentially macromolecules.

Conclusions:

  • Plasmodesmata play a vital role in symplastic signaling and transport.
  • Regulation of plasmodesmatal conductance controls intercellular communication.
  • Symplastic domains influence the movement of signaling molecules.