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Author Spotlight: Microscopic Analysis of Protein Localization at Plasmodesmata in Plants
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RNA on the move: The plasmodesmata perspective.

Brandon C Reagan1, Elena E Ganusova1, Jessica C Fernandez1

  • 1Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, TN 37996, United States.

Plant Science : an International Journal of Experimental Plant Biology
|August 16, 2018
PubMed
Summary
This summary is machine-generated.

Plant RNAs move between cells and long distances in phloem via plasmodesmata (PD). This review explores RNA trafficking through PD, their protein composition, and organelle roles in plant communication.

Keywords:
Intercellular traffickingMovement proteinPlant virusPlasmodesmataRNARibonucleoprotein complexViroid

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Cell Biology

Background:

  • Plant RNA molecules, including mRNA and small RNAs, are mobile and can exert functions distant from their synthesis sites.
  • Cell-to-cell and long-distance transport of RNA in plants occurs through plasmodesmata (PD) and the phloem.
  • Plasmodesmata (PD) possess complex structures that can limit the passage of RNA molecules.

Purpose of the Study:

  • To review the role of plasmodesmata (PD) in plant cell-to-cell and long-distance RNA communication.
  • To discuss the mechanisms of RNA movement to and through PD.
  • To highlight the involvement of PD protein composition and organelle RNA metabolism in regulating RNA flux.

Main Methods:

  • Literature review of existing research on RNA trafficking in plants.
  • Analysis of studies on plasmodesmata structure and function.
  • Synthesis of recent findings on RNA metabolism and its influence on PD flux.

Main Results:

  • Plant RNAs, including mRNA, endogenous small RNAs, and defense-related small RNAs, move through plasmodesmata (PD).
  • Long-distance RNA transport occurs via the phloem, facilitated by PD.
  • PD protein composition and organelle RNA metabolism are critical factors influencing RNA movement.

Conclusions:

  • Plasmodesmata (PD) are crucial regulators of RNA mobility, enabling both local and systemic communication in plants.
  • Understanding RNA trafficking through PD and the role of associated proteins and organelles is key to deciphering plant communication networks.
  • Despite advances, significant questions remain regarding the precise mechanisms and regulation of RNA mobility in plants.