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Tissue morphogenesis: a surface buckling mechanism.
1Departments of Orthopaedic Surgery and Mechanical Engineering, Johns Hopkins University, Baltimore, MD, USA. kvolokh@jhu.edu
The International Journal of Developmental Biology
|February 16, 2006
Summary
Constrained tissue growth can cause compression and surface buckling, leading to wavy patterns. This phenomenon requires anisotropic tissue properties and compressive stress for pattern formation.
Area of Science:
- Biophysics
- Developmental Biology
- Materials Science
Background:
- Surface patterns in biological tissues can arise from mechanical instabilities during growth.
- Surface buckling is a key morphogenetic mechanism observed in various biological systems.
Purpose of the Study:
- To investigate the theoretical basis of surface pattern formation through tissue growth-induced buckling.
- To identify the conditions under which surface buckling occurs in growing anisotropic tissues.
Main Methods:
- Phenomenological theory of tissue growth.
- Mathematical modeling of mechanical stresses and deformations in growing tissues.
- Analysis of the relationship between growth parameters, anisotropy, and pattern formation.
Main Results:
- Constrained growth can induce compressive stress, leading to surface buckling and wavy patterns.
- The critical mass supply for buckling is independent of pattern wavelength, allowing diverse pattern generation.
- Surface buckling is favored in tissues with strong anisotropy and internal compressive stresses.
Conclusions:
- Surface buckling is a viable mechanism for generating patterns in growing anisotropic tissues.
- The presence of compressive stress and high anisotropy are critical for this pattern formation.
- Experimental validation of pattern creation via controlled tissue growth and buckling presents a significant challenge.