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Related Concept Videos

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

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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...
Other Stress Responses in Bacteria01:30

Other Stress Responses in Bacteria

Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
Factors Influencing Microbial Growth: Temperature01:27

Factors Influencing Microbial Growth: Temperature

Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
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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Updated: Jun 25, 2026

Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat
06:03

Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat

Published on: September 20, 2016

Environmental stress and evolvability in microbial systems.

F Baquero1

  • 1Department of Microbiology-FIBio-RYC, CIBER-ESP and CSIC-Associated Unit on Bacterial Pathogenesis and Resistance, Ramón y Cajal University Hospital, Madrid, Spain. fbaquero.hrc@salud.madrid.org

Clinical Microbiology and Infection : the Official Publication of the European Society of Clinical Microbiology and Infectious Diseases
|February 18, 2009
PubMed
Summary
This summary is machine-generated.

Preserving microbial systems is vital for planetary health. Assessing microbial diversity across multiple scales can reveal environmental stress and guide interventions for a healthier planet.

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Area of Science:

  • Microbiology
  • Ecology
  • Evolutionary Biology

Background:

  • Microbial systems form Earth's
  • biological atmosphere
  • essential for planetary sustainability.
  • Detecting changes in these systems is critical for risk assessment and intervention.
  • Environmental changes can induce stress, potentially altering microbial evolvability.

Purpose of the Study:

  • To propose a multi-hierarchical framework for assessing microbial diversity.
  • To explore the relationship between microbial variation and environmental stress.
  • To establish microbial variation as an indicator of planetary health.

Main Methods:

  • Estimating microbial diversity on a multi-hierarchical scale.
  • Including sub-cellular entities (e.g., genes, plasmids) and supra-cellular organizations (e.g., communities, ecosystems).
  • Applying Hamiltonian criteria of inclusive fitness to different ensembles.

Main Results:

  • Microbial systems exhibit fractal patterns with constant and variable parts across scales.
  • Environmental stress can both reduce and increase variation within microbial systems.
  • Microbial variation serves as a potential indicator of planetary health.

Conclusions:

  • A multi-hierarchical approach is necessary for comprehensive microbial diversity assessment.
  • Microbial variation dynamics are complex and influenced by environmental factors.
  • Monitoring microbial systems offers insights into global environmental health and sustainability.