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Related Experiment Video

Updated: Jul 10, 2026

Single-cell Analysis of Bacillus subtilis Biofilms Using Fluorescence Microscopy and Flow Cytometry

Single-cell Analysis of Bacillus subtilis Biofilms Using Fluorescence Microscopy and Flow Cytometry

Published on: February 15, 2012

Thinking about Bacillus subtilis as a multicellular organism.

Claudio Aguilar¹, Hera Vlamakis, Richard Losick

¹Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115, United States.

Current Opinion in Microbiology

|November 6, 2007

Summary

Investigating bacterial multicellularity using Bacillus subtilis colony morphogenesis reveals a regulatory network controlling extracellular matrix production. This matrix is crucial for complex colony architecture and sporulation site development.

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Area of Science:

Microbiology
Developmental Biology
Systems Biology

Background:

Bacterial multicellularity research was limited by laboratory strains lacking developmental properties.
Undomesticated strains, particularly Bacillus subtilis, are now key models for studying colony morphogenesis.
Bacillus subtilis offers well-characterized developmental features valuable for this research.

Purpose of the Study:

To elucidate the molecular mechanisms of colony morphogenesis in bacteria.
To investigate the role of extracellular matrix in bacterial development.
To understand the regulatory networks governing bacterial colony architecture.

Main Methods:

Utilizing undomesticated Bacillus subtilis strains.
Employing genetic screens to identify mutants with defective colony morphology.
Analyzing the production of extracellular matrix and its impact on colony development.

Main Results:

Discovery of an intricate regulatory network controlling extracellular matrix production.
Demonstration that the extracellular matrix is essential for complex colony architecture.
Identification of aerial projections as preferential sporulation sites facilitated by the matrix.

Conclusions:

Bacillus subtilis is a powerful model for studying bacterial multicellularity and colony morphogenesis.
Extracellular matrix production is a critical factor in developing organized bacterial colony structures.
Future research should focus on the spatial and temporal regulation of developmental mechanisms in bacterial colonies.