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Growing cells push back under pressure.

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  • 1California Institute of Technology, Pasadena, CA 91125, USA.

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Plant cells sense and respond to mechanical stress by reorienting growth, guiding development. This process amplifies growth differences, stabilizing plant structures like the shoot apical meristem.

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Area of Science:

  • Plant biology
  • Developmental biology
  • Mechanobiology

Background:

  • Mechanical forces are crucial for stabilizing developmental processes in plants and animals.
  • Cellular mechanical sensing and force generation are key components of these processes.

Discussion:

  • Uyttewaal et al. show that Arabidopsis shoot apical meristem cells react to local mechanical stresses.
  • This response involves reorienting cell growth, which guides the overall morphogenesis of the plant structure.

Key Insights:

  • Cellular mechanical stress directly influences plant morphogenesis.
  • The mechanism involves amplifying, rather than suppressing, variations in growth rates among cells.

Outlook:

  • Understanding this mechanosensitive growth guidance could inform strategies for controlling plant development.
  • Further research into the molecular mechanisms of growth-rate heterogeneity amplification is warranted.