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Related Concept Videos

Microbial Morphologies01:29

Microbial Morphologies

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...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
Evolutionary Processes in Microbes01:26

Evolutionary Processes in Microbes

Microbial evolution occurs rapidly due to short generation times and a variety of genetic processes, including horizontal gene transfer, mutation, recombination, and genetic drift. These mechanisms collectively enable microbes to adapt swiftly to changing environments.Horizontal gene transfer (HGT) allows genes to move between different species and occurs through three main mechanisms: conjugation, transformation, and transduction. Conjugation involves direct cell-to-cell contact for DNA...
Microbial Mats01:25

Microbial Mats

Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
Microenvironments01:22

Microenvironments

Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.

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Related Experiment Video

Updated: May 29, 2026

Yeast Colony Embedding Method
09:04

Yeast Colony Embedding Method

Published on: March 22, 2011

Evolving architectural patterns in microbial colonies development.

F Gómez-Aguado1, L Alou, M T Corcuera

  • 1Department of Anatomical Pathology, Hospital Carlos III Madrid, Spain.

Microscopy Research and Technique
|September 22, 2011
PubMed
Summary
This summary is machine-generated.

Microbial colonies of Staphylococcus aureus, Escherichia coli, and Candida albicans display evolving internal structures. These complex patterns suggest a unique biofilm formation at the air-semisolid interface.

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Yeast Colony Embedding Method
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Area of Science:

  • Microbiology
  • Microbial Ecology
  • Biophysics

Background:

  • Microbial colonies can form complex structures.
  • Biofilms are structured microbial communities with significant clinical and environmental relevance.
  • Understanding colony development is key to controlling microbial growth.

Purpose of the Study:

  • To investigate the internal structural development of microbial colonies over time.
  • To characterize the layered patterns within colonies of specific bacterial and fungal strains.
  • To determine if these structures represent a form of biofilm.

Main Methods:

  • Culturing of ATCC strains: Staphylococcus aureus, Escherichia coli, and Candida albicans.
  • Preparation of semithin sections of colonies at various developmental stages.
  • Microscopic analysis to observe and document internal structural patterns.

Main Results:

  • Observed distinct, time-dependent internal structural patterns in all three ATCC strains.
  • Identified layered arrangements within colonies characterized by variable microbial population densities.
  • Noted the presence of dead cells integrated within the colony structure.
  • The observed structures are consistent with a biofilm exhibiting an air-semisolid interface.

Conclusions:

  • Microbial colony development involves the formation of specific, layered internal structures.
  • These structures, characterized by differential cell densities and dead cells, represent a unique biofilm.
  • The findings provide insights into microbial community organization and adaptation at interfaces.