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WOX going on: CLE peptides in plant development.

Andrew C Willoughby1, Zachary L Nimchuk2

  • 1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.

Current Opinion in Plant Biology
|June 2, 2021
PubMed
Summary

Plant CLAVATA3/EMBRYO-SURROUNDING REGION (CLE) peptides regulate plant tissue development. Recent advances reveal conserved CLE signaling in bryophytes and connections to auxin, impacting stem cell identity and development.

Keywords:
AuxinCLAVATACLE peptideMeristemPlant developmentReceptor kinaseWOX

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Area of Science:

  • Plant biology
  • Developmental biology
  • Molecular signaling

Background:

  • Plant tissue development relies on cell-cell communication via hormones, including CLAVATA3/EMBRYO-SURROUNDING REGION (CLE) peptides.
  • The CLE signaling peptide CLAVATA3 is crucial for shoot apical meristem size and WUSCHEL transcription factor regulation.

Purpose of the Study:

  • To review recent advances in CLE signaling pathways.
  • To explore conserved CLE signaling in bryophytes.
  • To examine CLE peptide roles in Arabidopsis thaliana root development and connections to auxin signaling.

Main Methods:

  • Literature review of recent research on CLE signaling.
  • Comparative analysis of CLE pathway conservation across plant species.
  • Integration of findings on CLE peptides, stem cell regulation, and auxin biosynthesis.

Main Results:

  • CLE signaling pathways are conserved in bryophytes.
  • CLE peptides in Arabidopsis thaliana regulate stem cell identity and division in root tissues.
  • CLE signaling intersects with auxin biosynthesis, influencing flower and leaf development.

Conclusions:

  • Recent findings highlight WUSCHEL-independent roles for CLE signaling.
  • There is significant overlap between CLE and auxin signaling pathways.
  • CLE peptides are key regulators of plant development through conserved and novel mechanisms.