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Related Experiment Video

Updated: Apr 18, 2026

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Multiple pathways regulate shoot branching.

Catherine Rameau1, Jessica Bertheloot2, Nathalie Leduc3

  • 1Institut Jean-Pierre Bourgin, INRA, UMR 1318, ERL CNRS 3559, Saclay Plant Sciences , Versailles, France ; Institut Jean-Pierre Bourgin, AgroParisTech, UMR 1318, ERL CNRS 3559, Saclay Plant Sciences , Versailles, France.

Frontiers in Plant Science
|January 29, 2015
PubMed
Summary
This summary is machine-generated.

Plant shoot branching is controlled by integrating various signals, including hormones like auxin and strigolactones. TB1/BRC1 and auxin transport are key integrators, with modeling aiding understanding of this complex process.

Keywords:
apical dominanceaxillary bud outgrowthcytokininsfloweringmodelingpolar auxin transportshade avoidancestrigolactone

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Genetics

Background:

  • Shoot branching is a crucial trait influencing plant architecture and yield.
  • Axillary bud outgrowth is regulated by complex interactions of endogenous, developmental, and environmental factors.
  • Understanding these regulatory networks is key to manipulating plant architecture.

Purpose of the Study:

  • To elucidate the integrated pathways controlling shoot branching.
  • To identify key molecular integrators of branching signals.
  • To explore the role of environmental factors, like shade, in regulating shoot architecture.

Main Methods:

  • Review and synthesis of existing literature on plant hormones and signaling pathways.
  • Analysis of molecular mechanisms underlying shade response in plant branching.
  • Discussion of potential roles for transcription factors and polar auxin transport.
  • Exploration of computational modeling approaches for plant development.

Main Results:

  • Multiple hormonal (auxin, cytokinins, strigolactones, gibberellins) and non-hormonal (sugars, phase transition factors) pathways converge to regulate shoot branching.
  • The transcription factor TB1/BRC1 and polar auxin transport in the stem are proposed as key integrators.
  • Shade response involves specific molecular mechanisms influencing branching patterns.

Conclusions:

  • Shoot branching is a highly integrated process involving numerous signaling pathways.
  • TB1/BRC1 and polar auxin transport are critical hubs for integrating diverse signals controlling shoot architecture.
  • Modeling offers a powerful tool to understand and predict shoot branching phenotypes.