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Related Concept Videos

Microbial Morphologies01:29

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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...
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Flagella are specialized, thread-like structures that extend from a bacteria's cell envelope. They play a crucial role in motility and chemotaxis. Their structural organization and functioning exemplify sophisticated biological engineering, enabling bacterial survival and adaptability in diverse environments.Structure of the FlagellumA bacterial flagellum consists of three key components: the filament, the hook, and basal body. The filament, a long, helical structure composed of repeating...
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Bacterial Phylum Planctomycetes01:26

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Planctomycetes are a group of morphologically distinct bacteria predominantly classified into two orders: Planctomycetales and Brocadiales. These gram-negative bacteria exhibit unique features, including division by budding and the presence of stalks or appendages. Their cells are often found in rosette arrangements, and they are notable for possessing an S-layer in their cell envelope, which is relatively uncommon among bacteria. Additionally, Planctomycetes frequently exhibit intracellular...
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Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
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Mechanisms of Membrane Domain Formation00:59

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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
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Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
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Monitoring Spatial Segregation in Surface Colonizing Microbial Populations
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Cell morphology drives spatial patterning in microbial communities.

William P J Smith1, Yohan Davit2, James M Osborne3

  • 1Department of Computer Science, University of Oxford, Oxford OX1 3QD, United Kingdom.

Proceedings of the National Academy of Sciences of the United States of America
|January 1, 2017
PubMed
Summary
This summary is machine-generated.

Microbial cell shape significantly impacts biofilm structure and fitness. Round cells rise to the top of communities, while rod cells occupy lower positions, influencing spatial organization and survival.

Keywords:
biofilmsbiophysicscell morphologyself-organizationsynthetic biology

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Area of Science:

  • Microbiology
  • Biophysics
  • Evolutionary Biology

Background:

  • Microbial cell shape is a key phenotype, yet its role in complex communities like biofilms remains poorly understood.
  • Understanding how morphology influences microbial interactions and community structure is crucial for various biological and biotechnological applications.

Purpose of the Study:

  • To investigate the impact of microbial cell shape on community patterning and evolutionary fitness within biofilms.
  • To elucidate the mechanisms by which different cell morphologies contribute to spatial structuring in microbial communities.

Main Methods:

  • Utilized individual-based modeling to simulate microbial communities with systematically varied cell shapes.
  • Experimentally tested model predictions using strains of Escherichia coli with distinct morphologies (coccal vs. rod) but similar growth rates.

Main Results:

  • Modeling predicted that cell shape strongly influences lineage fate and community spatial structuring.
  • Experimental results confirmed predictions: coccal cells preferentially occupied the upper surface of colonies, while rod cells dominated basal and edge regions.
  • Observed strong shape-based sorting within experimental microbial communities.

Conclusions:

  • Microbial cell morphology plays a critical role in shaping biofilm architecture and spatial organization.
  • Cell shape-driven spatial structuring can significantly impact the evolutionary fitness of microbial lineages within communities.
  • Findings suggest potential for engineering synthetic microbial communities by controlling cell morphology.