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Related Experiment Video

Updated: Feb 11, 2026

Analyzing Murine Schwann Cell Development Along Growing Axons

Analyzing Murine Schwann Cell Development Along Growing Axons

Published on: November 21, 2012

Shape and dynamics of tip-growing cells.

Otger Campàs¹, L Mahadevan

¹School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.

Current Biology : CB

|December 22, 2009

Summary

Cell walls remodel shape under turgor pressure. This study models tip growth, revealing a single parameter governs cell shape variability in plants, fungi, and bacteria.

Area of Science:

Cellular biology
Biophysics
Theoretical biology

Background:

Walled cells remodel shape while maintaining high internal turgor pressure.
Previous theoretical models focused separately on cell wall mechanics or assembly, not their interplay.
Tip-growing cells offer a simplified geometry to study growth and mechanics.

Purpose of the Study:

To investigate the interplay between cell wall assembly and mechanics in shaping walled cells.
To develop a theoretical framework for tip growth that integrates cell wall mechanics and material supply.
To identify key parameters governing cell shape variability in tip-growing organisms.

Main Methods:

Modeling tip growth using the geometry of elongating cells.
Describing irreversible cell wall expansion as a viscous fluid shell under turgor pressure.

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Published on: March 30, 2011

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Last Updated: Feb 11, 2026

Analyzing Murine Schwann Cell Development Along Growing Axons

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Published on: November 21, 2012

Shape Memory Polymers for Active Cell Culture

Shape Memory Polymers for Active Cell Culture

Published on: July 4, 2011

Imaging Cell Shape Change in Living Drosophila Embryos

Imaging Cell Shape Change in Living Drosophila Embryos

Published on: March 30, 2011

Deriving theoretical relationships between cell radius, growth velocity, turgor pressure, and cell wall material properties.

Main Results:

A theoretical model for tip growth was developed, treating the cell wall as an inhomogeneous viscous fluid shell.
The model determines cell radius and growth velocity based on turgor pressure, secretion rate, and cell wall rheology.
A single dimensionless parameter was found to explain the observed shape variability in tip-growing cells.

Conclusions:

The study provides a unified theoretical framework for understanding cell growth and remodeling in various organisms.
The findings highlight the critical role of coordinating cell wall assembly and expansion for cell shape.
The derived scaling laws and dimensionless parameter offer predictive power for cell geometry and growth dynamics.