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Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

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Related Experiment Video

Updated: May 28, 2026

Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells
11:31

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Published on: May 12, 2023

Cell geometry and mechanical stress coordinate stomatal division orientation.

Leo Serra1, Euan T Smithers1, Lucy Bentall1

  • 1Sainsbury Laboratory Cambridge University, Bateman Street, Cambridge, UK.

Cell Reports
|May 26, 2026
PubMed
Summary

Plant cell division typically creates equal daughter cells. However, this study reveals that mechanical stress and cell geometry influence the orientation of the final symmetric stomatal division in dicots, deviating from the shortest path rule.

Keywords:
CP: developmental biologyCP: plantsdivision orientationepidermal patterningmechanical stressstomata

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Area of Science:

  • Plant developmental biology
  • Cell biology
  • Biophysics

Background:

  • Plant cell division usually produces two equal daughter cells via the shortest path.
  • Early stomatal development in dicots involves asymmetric divisions guided by polarized proteins.
  • The orientation of the final symmetric stomatal division remains poorly understood.

Purpose of the Study:

  • To investigate the factors controlling the orientation of the final symmetric cell division in the stomatal lineage.
  • To understand how cell geometry and mechanical forces coordinate stomatal division alignment at the organ level.

Main Methods:

  • Utilized a plant system where all cells differentiate into stomata.
  • Employed time-lapse imaging to observe cell division and growth dynamics.
  • Applied finite element modeling to analyze growth-derived stress patterns.
  • Performed mechanical perturbations to assess stress influence on division orientation.

Main Results:

  • Stomatal divisions show preferential alignment with cell geometry.
  • Differential growth-derived stress patterns were identified as a potential coordinating factor.
  • Mechanical stress was shown to influence the orientation of stomatal divisions.

Conclusions:

  • Cell geometry and organ-scale mechanical stress play crucial roles in orienting the final symmetric stomatal division.
  • This provides new insights into the regulation of cell division beyond the shortest path rule in plant development.