C. elegans colony formation as a condensation phenomenon.

Area of Science:

• Biology
• Biophysics
• Systems Biology

Background:

• Phase separation is a fundamental process at the molecular scale influencing numerous biological functions.
• Evidence suggests analogous phase separation phenomena occur across various biological scales.

Purpose of the Study:

• To investigate if population-level phenomena, specifically colony formation in the nematode C. elegans, exemplify phase separation principles.
• To explore the theoretical underpinnings and observable characteristics of collective organism behavior through the lens of phase separation.

Main Methods:

• Observational analysis of C. elegans colony formation dynamics.
• Development and application of a simple two-compartment ordinary differential equation model to predict colony formation thresholds.
• Characterization of colony fusion and coarsening behaviors.

Main Results:

• Colony formation in C. elegans exhibits a threshold-dependent behavior influenced by population density.
• A mathematical model accurately predicts the observed threshold for colony formation.
• Observed phenomena include colony fusion and Ostwald ripening-like coarsening, characteristic of phase separation systems.

Conclusions:

• Collective behaviors in C. elegans populations can be understood through the framework of phase separation.
• The study supports the broader applicability of microscopic phase separation principles to macroscopic biological organization and collective dynamics.