Planktonic Bacteria
Planktonic Bacteria - Related Videos
11:47
Concentration of Metabolites from Low-density Planktonic Communities for Environmental Metabolomics using Nuclear Magnetic Resonance Spectroscopy
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Cited by 15 •
2012
A method for metabolite extraction from microbial planktonic communities is presented. Whole community sampling is achieved by filtration onto specially prepared filters. After lyophilization, aqueous-soluble metabolites are extracted. This approach allows for application of environmental metabolomics to trans-omics investigations of natural or experimental microbial communities.
03:38
Quantifying Enzyme-Induced Biofilm Suppression in Pathogenic Bacteria
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2026
Source: Tay, S. B., et al. Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases. J. Vis. Exp. (2016)The video demonstrates a method to quantify biofilm biomass in a pathogenic bacterium, comparing untreated controls with samples treated with a quorum-quenching enzyme. The enzyme disrupts bacterial signaling during early incubation, reducing cell adhesion. After washing and further incubation, control wells form dense biofilms, while treated wells show...
15:28
Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon
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Cited by 4 •
2012
The design of a synthetic operon encoding both the secretory apparatus and the structural monomers of curli fibers is described. Overproduction of these amyloids and adherent polymers allows a measurable gain of adherence of the E. coli chassis1. Easy ways to visualize and quantify adherence are explained.
04:37
A Method for Sample Preparation to Visualize Biofilm Forming Bacteria on Fungal Hyphae
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2025
This video describes a method to grow and qualitatively analyze bacterial biofilms on fungal hyphae using microscopy. Bacterial biofilms frequently form on fungal surfaces and involve numerous bacterial-fungal interaction processes, such as metabolic cooperation, competition, or predation.
04:02
Detection of Target Gene Expression in a Bacteria-Infected Mouse Brain
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2026
Source: Zhang, S., et al. Intracranial Subarachnoidal Route of Infection for Investigating Roles of Streptococcus suis Biofilms in Meningitis in a Mouse Infection Model. J. Vis. Exp. (2018).This video demonstrates the detection of target gene expression in a bacteria-infected mouse brain. RNA is extracted, treated with a DNA-degrading enzyme, and reverse-transcribed into cDNA. The cDNA is amplified through thermal cycling with gene-specific primers, while a DNA-binding dye binds to the...
FAQs
Activity responds to nutrient availability, temperature, light, and water movement. Nutrients can determine access to dissolved compounds, while temperature influences biological processes. Light matters especially where photosynthetic activity contributes, and water movement affects suspension and the distribution of resources. Together, these conditions help explain why abundance and activity vary among aquatic settings.
Heterotrophy allows cells to process dissolved organic compounds, while photosynthesis enables transformation of dissolved inorganic compounds using light-associated metabolism. These pathways give the community more than one route for altering materials in the water. Their combined activity helps connect chemical resources with microbial food webs, supporting energy transfer and influencing overall aquatic productivity.
Water movement can influence where cells remain suspended and how conditions experienced by a community change over time. Because planktonic bacteria respond to nutrient availability, temperature, light, and movement, shifting hydrodynamic conditions may coincide with changes in abundance or activity. Considering movement alongside the other variables gives a more complete interpretation of aquatic microbial patterns.
By transforming dissolved organic and inorganic compounds, planktonic bacteria help convert chemical material into forms that participate in microbial food webs. This role links decomposition and nutrient recycling with energy transfer to larger organisms, so bacterial activity can influence both the chemical state of water and the productivity of the wider ecosystem.
Comparisons should pair bacterial abundance and activity with surrounding conditions, especially nutrient availability, temperature, light, and water movement. Researchers can also distinguish whether heterotrophic or photosynthetic processes are relevant to the observed pattern. This framework helps relate community differences to dissolved-compound transformation rather than treating cell counts alone as a complete ecological explanation.
Because their abundance and activity respond to environmental conditions, these communities can provide biological evidence of changing aquatic systems. Researchers can examine them when evaluating pollution or climate-related shifts, then relate observed microbial responses to altered nutrient conditions, temperature, light, or water movement. This perspective connects environmental change with ecosystem function and water quality.
Their decomposition and nutrient-recycling activities alter the movement of organic and inorganic materials through aquatic systems. By supporting microbial food webs and energy transfer to larger organisms, they can influence productivity, while their processing of dissolved compounds relates bacterial activity to water quality. These connections make them relevant in both marine and freshwater biology.