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Pattern and control in bacterial colony development.

J A Shapiro1

  • 1Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637.

Science Progress
|January 1, 1992
PubMed
Summary
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Bacteria form complex, organized multicellular communities like those seen in Escherichia coli colonies. These bacterial communities exhibit sophisticated control systems coordinating growth and gene expression in response to environmental cues.

Area of Science:

  • Microbiology
  • Bacterial community dynamics
  • Cellular organization

Background:

  • Bacteria are increasingly recognized as sophisticated organisms capable of complex behaviors.
  • Multicellular bacterial communities exhibit organized and differentiated structures.
  • Escherichia coli colonies serve as a model system for studying bacterial community development.

Purpose of the Study:

  • To investigate the organizational principles of bacterial colonies.
  • To understand the control systems governing colony development and gene expression.
  • To explore the role of environmental factors in coordinating bacterial community formation.

Main Methods:

  • Microscopic visualization of colony structure.
  • Macrophotography to observe colony morphology.

Related Experiment Videos

  • Differential gene expression analysis using specialized dyes and genetic engineering.
  • Observation of colony growth dynamics and responses to experimental disruptions.
  • Assessment of gene expression patterns in response to obstacles and neighboring colonies.

    • Main Results:

    • Bacterial colonies, exemplified by Escherichia coli, display intricate organization.
    • Developmental control systems actively produce regular patterns within colonies.
    • Colony development is influenced by non-linear responses to chemical gradients in the substrate.
    • Gene expression patterns are modulated by physical obstacles and interactions with other colonies.

    Conclusions:

    • Bacterial colonies are highly organized, differentiated multicellular communities.
    • Sophisticated internal control systems regulate bacterial colony development.
    • Chemical gradients and external stimuli play crucial roles in coordinating bacterial community formation and gene expression.