Self-Organization and Genomic Causality in Models of Morphogenesis

Area of Science:

• Developmental Biology
• Systems Biology
• Theoretical Biology

Background:

• The origin of form and structure in embryological development is a long-standing debate.
• Recent focus is on self-organization versus genome determination (gene regulatory processes) in pattern formation.
• Alan Turing's 1952 reaction-diffusion model is a key historical contribution.

Purpose of the Study:

• To analyze historical and current models of pattern formation and form generation in embryogenesis.
• To emphasize the evolution and impact of Alan Turing's reaction-diffusion model.
• To present Eric Davidson's gene-regulatory network theory as a successful explanation for early embryogenesis.

Main Methods:

• Review and analysis of pertinent pattern formation models in developmental biology.
• Historical examination of the reception and adaptation of Alan Turing's reaction-diffusion model.
• Discussion of Eric Davidson's gene-regulatory network analysis and mathematical modeling approach.

Main Results:

• Turing's model initially had limited biological impact due to its purely physical-chemical basis.
• Post-2000, Turing's model gained traction with biological integration, though limitations persisted.
• Davidson's gene-regulatory network model successfully explained developmental cell fate specification, evolution, and species stability.

Conclusions:

• Gene regulatory networks offer a more comprehensive explanation for embryological development than reaction-diffusion models alone.
• Davidson's theory integrates genetic mechanisms with evolutionary and developmental stability.
• Future developments are expected in gene regulatory network modeling for understanding embryogenesis.