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Tracking the messengers: Emerging advances in mRNA-based plant communication.

Saikat Paul1, David Jackson2, Munenori Kitagawa1

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Plants use mobile messenger RNAs (mRNAs) to signal between cells and organs. This review explores how messenger RNA ribonucleoprotein (RNP) complexes form and move through plasmodesmata (PDs) for plant communication.

Keywords:
Extracellular vesiclesNon-cell-autonomous mRNAParasitic plantPhloemPlasmodesmataRNA-binding proteinRibonucleoprotein complex

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Area of Science:

  • Plant molecular biology
  • Cellular signaling
  • Plant physiology

Background:

  • Messenger RNAs (mRNAs) are key for protein synthesis but also function in cell-to-cell communication.
  • Plants integrate internal and external signals to regulate mRNA transport for specific responses.
  • Mobile mRNAs exist as ribonucleoprotein (RNP) complexes during transport.

Purpose of the Study:

  • To review recent advances in mRNA transport mechanisms in plants.
  • To focus on ribonucleoprotein (RNP) complex formation and plasmodesmata (PD) transport.
  • To discuss the roles of mRNA transport in intra- and inter-organism communication.

Main Methods:

  • Literature review of recent advances (2-3 years).
  • Analysis of ribonucleoprotein (RNP) complex formation.
  • Examination of plasmodesmata (PD) interactions and transport selectivity.

Main Results:

  • mRNA transport is regulated by RNP complex composition.
  • Plasmodesmata (PD) are crucial mediators of selective mRNA movement.
  • mRNA transport plays roles in local and systemic signaling, and inter-organism communication.

Conclusions:

  • Understanding RNP-PD interactions is key to deciphering mRNA transport.
  • Mobile mRNAs are vital for plant development, stress responses, and communication.
  • Non-cell-autonomous mRNA signaling has broader implications, including inter-organism interactions.