Bacterial Adaptation
Bacterial Adaptation - Related Videos
03:42
Adaptive Evolution of Bacteria Using a Microbial Microdroplet Culture System
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2025
Source: Jian, X., et al., Automated Microbial Cultivation and Adaptive Evolution using Microbial Microdroplet Culture System (MMC). J. Vis. Exp. (2022).This video demonstrates the use of a microbial microdroplet culture system to drive adaptive evolution of bacteria toward methanol tolerance. By mixing engineered bacterial cultures with a high-methanol stress medium and segmenting them into microdroplets, the system selects for mutants that exhibit improved growth under methanol stress. Through...
02:18
Isolation of Stress-Adapted Bacteria through Single Colony Selection
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2025
Source: Jeong, H., et. al. Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat. J. Vis. Exp. (2016).This video demonstrates the selective isolation and growth of stress-adapted bacteria from a culture exposed to prolonged stress conditions. The culture is plated on stressor-containing agar, and a single colony is selected to inoculate a liquid medium with the stressor. Absorbance is measured at regular intervals to monitor the growth and confirm the successful...
11:30
A Molecular Readout of Long-term Olfactory Adaptation in C. elegans
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Cited by 2 •
2012
Here we describe a molecular readout of long-term olfactory adaptation in Caenorhabditis elegans. The Protein Kinase G, EGL-4, is necessary for stable adaptation responses in the primary sensory neuron pair called AWC. During prolonged odor exposure EGL-4 translocates from the cytosol to nucleus of the AWC.
10:54
Transformation of E. coli Cells Using an Adapted Calcium Chloride Procedure
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2023
Source: Natalia Martin1, Andrew J. Van Alst1, Rhiannon M. LeVeque1, and Victor J. DiRita1 1 Department of Microbiology and Molecular Genetics, Michigan State University Bacteria have the ability to exchange genetic material (DeoxyriboNucleic Acid, DNA) in a process known as horizontal gene transfer. Incorporating exogenous DNA provides a mechanism by which bacteria can acquire new genetic traits that allow them to adapt to changing environmental conditions, such as the presence of antibiotics...
05:21
Bacterial Transformation - Student Protocol
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2019
Bacterial Transformation ExpandIMPORTANT: In addition to wearing the appropriate personal protective equipment, be sure to take care to keep your face away from suspension cultures, and to avoid inhaling reagents. Do not touch your face while performing the experiment. Always wash your hands before and after every experiment. When you are ready to safely begin, check to make sure you have a tube or tubes of competent E. coli cells in your ice bucket. Then, transfer 50 µL from one of these tubes...
FAQs
Mutation creates genetic changes within a bacterial lineage, whereas horizontal gene transfer moves genetic material between bacteria. These routes provide variation on which natural selection can act. Their distinction matters because adaptation may reflect changes inherited through reproduction or newly acquired traits, including those associated with antibiotic resistance and the emergence of pathogenic traits.
Regulatory networks alter gene expression and cellular physiology as conditions change. In response to nutrient limitation, temperature shifts, or antibiotic exposure, these networks help coordinate bacterial functions with the immediate environment. This regulation complements genetic change by influencing how existing cellular capabilities are deployed, affecting survival during stress.
Environmental change can expose differences in bacterial survival or reproduction. Natural selection favors traits that improve performance under those conditions, allowing advantageous characteristics to become more prominent in a population. This principle connects genetic variation and stress responses to outcomes such as resistance, persistence, and adaptation to distinct habitats.
Antibiotic exposure creates a condition in which bacterial traits that improve survival can be favored. Genetic mutation, horizontal gene transfer, and stress-responsive regulation can all contribute to the relevant variation or physiology. Understanding these interactions helps explain why resistance emerges and supports the development of antimicrobial strategies and infection-control approaches.
Persistence shows how bacterial populations cope with changing environmental demands rather than responding to a single condition alone. Examining this outcome can clarify how nutrient availability, temperature, or other stresses influence survival over time. The resulting knowledge is relevant to environmental microbiology and to understanding bacterial distribution in varied settings.
Research on these processes supports several areas of biology, including antimicrobial development, infection control, environmental microbiology, and biotechnology. It can also clarify how pathogenic traits emerge and how bacteria remain viable under difficult conditions. These insights connect fundamental microbial evolution with efforts to manage infections and use bacterial capabilities productively.