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Related Experiment Video

Updated: Jun 20, 2026

Quantification of Endogenous Auxin and Cytokinin During Internode Culture of Ipecac
07:57

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Published on: March 15, 2018

Cytokinin-auxin crosstalk.

Laila Moubayidin1, Riccardo Di Mambro, Sabrina Sabatini

  • 1Dipartimento di Genetica e Biologia Molecolare, Laboratory of Functional Genomics and Proteomics of Model Systems, Università La Sapienza, 00185 Rome, Italy.

Trends in Plant Science
|September 8, 2009
PubMed
Summary

Plant growth relies on meristems, where cytokinin and auxin hormones interact. Cytokinin promotes differentiation by inhibiting auxin, while auxin drives cell division, maintaining root meristem size and growth.

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Hormone Signaling

Background:

  • Meristems are crucial for post-embryonic plant growth, providing undifferentiated cells for adult structures.
  • Cytokinin and auxin are key plant hormones known to antagonistically regulate meristem activity.
  • Understanding hormone interactions is vital for comprehending plant development.

Purpose of the Study:

  • To review recent advancements in the molecular mechanisms of cytokinin and auxin interaction in plant development.
  • To elucidate how these hormones control specific developmental processes, particularly in root meristems.
  • To highlight the coordinated action of cytokinin and auxin in maintaining meristem function.

Main Methods:

  • Literature review of recent significant progress in plant hormone research.
  • Analysis of molecular mechanisms governing cytokinin and auxin signaling pathways.
  • Focus on case studies, such as the root meristem of Arabidopsis thaliana.

Main Results:

  • Cytokinin represses auxin signaling and transport, promoting cell differentiation in root meristems.
  • Auxin promotes cell division, sustaining root meristem activity.
  • The antagonistic interplay between cytokinin and auxin is essential for root meristem homeostasis.

Conclusions:

  • The coordinated action of cytokinin and auxin is fundamental for regulating meristem size and ensuring root growth.
  • Elucidating these hormonal interactions provides insights into controlling plant development.
  • This review synthesizes current knowledge on hormone-mediated control of plant meristems.