Formative capacities of mechanically stressed networks: developmental and evolutionary implications

Area of Science:

• Biophysics
• Developmental Biology
• Evolutionary Biology

Background:

• Morphogenesis, the process of shape formation in biological organisms, remains incompletely understood, particularly the genetic regulation of these complex processes.
• Existing models often rely on prepatterning or complex initial geometries, limiting their scope in explaining the emergence of diverse biological forms.

Purpose of the Study:

• To present a novel biomechanical model of morphogenesis.
• To demonstrate the formative capacities of stressed networks with simple initial geometries.
• To explore the relationship between mechanical forces, genetic factors, and shape determination in biological systems.

Main Methods:

• Development of a biomechanical model simulating stressed networks with kinematically independent elements.
• Application of periodic impulses to generate pressure and local curvature increases, opposed by elastic resistance.
• Classification of modeled shapes based on symmetry orders and comparison with natural forms.

Main Results:

• The model successfully generates complex shapes from simple initial geometries through internal pressures and elastic resistance.
• Modeled shapes exhibit varying symmetry orders, comparable to those observed in ancient Echinodermata and Arthropods.
• The model parameters, though evenly spread, can be associated with genetic factors, linking mechanics to genetic regulation.

Conclusions:

• Biomechanical stress in simple networks is a significant driver of morphogenesis.
• The model provides a framework for understanding genetic regulation of shape formation without prepatterns.
• The findings suggest potential evolutionary and developmental implications for understanding biological form diversity.