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The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
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Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
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Related Experiment Video

Updated: Mar 25, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
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On growth and formins.

Fatima Cvrčková1, Denisa Oulehlová1, Viktor Žárský1

  • 1a Department of Experimental Plant Biology , Faculty of Sciences, Charles University , Prague , Czech Republic.

Plant Signaling & Behavior
|February 25, 2016
PubMed
Summary

Arabidopsis formin FH1 enhances pavement cell lobing and microtubule dynamics. This suggests formins coordinate actin and microtubule cytoskeletal systems during plant epidermal development.

Area of Science:

  • Plant biology
  • Cell biology
  • Developmental biology

Background:

  • Plant epidermal development involves cytoskeletal dynamics and cell surface expansion.
  • Microtubules and actin filaments play roles in pavement cell lobe formation.
  • Mutations in ARP2/3 complex impair pavement cell lobing, indicating actin's importance.

Purpose of the Study:

  • Investigate the role of Arabidopsis formin FH1 in pavement cell morphogenesis.
  • Determine the relationship between formin FH1, microtubule dynamics, and pavement cell lobing.

Main Methods:

  • Genetic analysis of Arabidopsis formin FH1 mutants.
  • Observation of microtubule dynamics in pavement cells.
  • Assessment of pavement cell lobing phenotypes.
Keywords:
ActinFH2 proteinscell growthepidermal pavement cellsforminsmicrotubules

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Main Results:

  • Impairment of formin FH1 function enhances microtubule dynamics.
  • Formin FH1 deficiency leads to increased pavement cell lobing.
  • Formins may regulate both actin and microtubule cytoskeletons.

Conclusions:

  • Formin FH1 is involved in coordinating actin and microtubule cytoskeletal systems.
  • Formins play a crucial role in regulating pavement cell morphogenesis.
  • These findings offer new insights into the molecular mechanisms of plant epidermal development.