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Related Concept Videos

Microbial Morphologies01:29

Microbial Morphologies

263
Bacterial and archaeal cells exhibit remarkable diversity in shape and structure, critical in their adaptability and functionality. Among bacteria, the most commonly observed shapes include cocci and bacilli. Cocci are spherical and may exist singly or in groupings such as pairs (diplococci), chains (streptococci), clusters (staphylococci), or tetrads. Bacilli, in contrast, are rod-shaped and can also occur as single cells, in pairs, or chains, depending on their environmental and genetic...
263

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Monitoring Spatial Segregation in Surface Colonizing Microbial Populations
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Probing patterning in microbial consortia with a cellular automaton for spatial organisation.

Sankalpa Venkatraghavan1,2, Sathvik Anantakrishnan1,2, Karthik Raman3,4,5

  • 1Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, 600 036, India.

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Summary

Synthetic biology models reveal how bacterial communication controls spatial organization. Quorum sensing modulation via acyl homoserine lactone secretion enables precise control over microbial community structure and population dynamics.

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Area of Science:

  • Synthetic biology
  • Microbial ecology
  • Computational modeling

Background:

  • Microbial consortia display complex spatial patterns in nature.
  • Studying natural communities is challenging due to inherent complexity.
  • Synthetic models offer a tractable approach to investigate microbial self-organization.

Purpose of the Study:

  • To develop novel bacterial communication frameworks for exploring microbial spatiotemporal organization.
  • To establish the effectiveness of communication strategies in coupling microbial growth rates.
  • To demonstrate spatial organization as a tunable parameter in synthetic biology.

Main Methods:

  • Development of quorum sensing-mediated models of microbial growth.
  • Simulation of microbial community dynamics from arbitrary initial configurations.
  • Characterization of acyl homoserine lactone secretion rates as a control mechanism.

Main Results:

  • Quorum sensing-coupled consortia behavior is effectively modulated by acyl homoserine lactone secretion rates.
  • Achieved control over relative populations of constituent species in spatial arrangements.
  • Models accurately recapitulate experimental findings on synthetic multicellular pattern formation.
  • Developed software tool facilitates implementation, analysis, and gene circuit development.

Conclusions:

  • Spatial organization is a tunable parameter in synthetic biology.
  • A novel communication paradigm based on location and coupling strength of microbial strains was introduced.
  • The developed models and tools enable the construction of desired microbial community structures.