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Updated: Sep 15, 2025
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Assay for Adhesion and Agar Invasion in S. cerevisiae
Published on: November 8, 2006
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Accidental and Regulated Cell Death in Yeast Colony Biofilms
Daniel J Netherwood1, Alexander K Y Tam2, Campbell W Gourlay3
1School of Computer and Mathematical Sciences, The University of Adelaide, North Terrace Campus, Adelaide, 5000, SA, Australia.
Bulletin of Mathematical Biology
|July 17, 2025
Summary
This study models yeast colony biofilm growth, incorporating accidental cell death (ACD) and regulated cell death (RCD). The model reveals how these cell death mechanisms impact biofilm expansion, morphology, and cell distribution.
Area of Science:
- Microbiology
- Cell Biology
- Mathematical Biology
Background:
- Saccharomyces cerevisiae is a key eukaryotic model organism.
- Yeast colony biofilms, with their self-produced extracellular matrix, are of significant biological and biomedical interest.
- Cellular demise via accidental cell death (ACD) or regulated cell death (RCD) is crucial for biofilm expansion.
Purpose of the Study:
- To generalize a continuum model for nutrient-limited yeast colony biofilm growth.
- To incorporate the effects of both accidental cell death (ACD) and regulated cell death (RCD) into the model.
- To analyze the impact of ACD and RCD on biofilm expansion dynamics.
Main Methods:
- Developed a generalized continuum model for yeast colony biofilm growth.
- The model includes four coupled nonlinear reaction-diffusion equations.
- Simulated the model in one and two spatial dimensions.
Main Results:
- Numerical solutions demonstrate the influence of ACD and RCD on expansion speed.
- The model predicts how ACD and RCD affect colony biofilm morphology.
- Results show the impact of cell death mechanisms on cell distribution within the biofilm.
Conclusions:
- The generalized model provides insights into yeast colony biofilm development.
- Accidental cell death and regulated cell death significantly influence biofilm characteristics.
- Model predictions show good qualitative agreement with experimental observations.
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