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Two-stage aggregate formation via streams in myxobacteria.
M S Alber1, M A Kiskowski, Y Jiang
1Mathematics Department, University of Notre Dame, Indiana 46556, USA.
Physical Review Letters
|August 25, 2004
Summary
Myxobacteria aggregation into fruiting bodies was modeled using a lattice cell model. Short-range interactions create transient streams, leading to stable aggregates, with noise enhancing this process.
Area of Science:
- Microbiology
- Computational Biology
- Biophysics
Background:
- Myxobacteria exhibit complex multicellular behaviors, including aggregation into fruiting bodies under nutrient-poor conditions.
- Understanding the mechanisms driving myxobacteria aggregation is crucial for deciphering microbial development.
Purpose of the Study:
- To model and understand the self-organization process of myxobacteria aggregation.
- To investigate the role of short-range cell-cell interactions in forming stable multicellular structures.
Main Methods:
- Development of a lattice cell model simulating myxobacteria behavior.
- Implementation of local interaction rules based on non-chemotactic cell-cell forces.
- Analysis of aggregate formation and stability under varying conditions, including noise.
Main Results:
- The model successfully reproduced the two-stage aggregation process observed in myxobacteria, mediated by transient cell streams.
- Generated aggregates demonstrated stability against significant perturbations.
- Increased noise in individual cell behavior led to larger and more robust aggregates.
Conclusions:
- Short-range, non-chemotactic interactions are sufficient to drive complex myxobacteria aggregation.
- Transient streams play a key role in the self-organization of myxobacteria into fruiting bodies.
- Stochasticity (noise) in cell behavior can enhance the formation of stable multicellular structures.