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Related Experiment Videos

A simple, rapid method for demonstrating bacterial flagella.

H P Grossart1, G F Steward, J Martinez

  • 1Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0202, USA. hgrossart@icbm.uni-oldenburg.de

Applied and Environmental Microbiology
|August 5, 2000
PubMed
Summary
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A new NanoOrange fluorescent stain rapidly detects bacterial flagella in 10-15 minutes. This method accurately identifies bacterial motility structures, aiding aquatic microbial ecology research.

Area of Science:

  • Microbiology
  • Microbial Ecology

Background:

  • Bacterial flagella are crucial for motility and are traditionally visualized using Transmission Electron Microscopy (TEM).
  • TEM is a complex, time-consuming technique requiring sample fixation and dehydration, limiting live-cell observation.
  • A rapid, simple method for flagellar visualization is needed, especially for live aquatic bacteria.

Purpose of the Study:

  • To develop and validate a rapid fluorescent staining method for bacterial flagella detection.
  • To compare the efficacy of the new method with Transmission Electron Microscopy (TEM).
  • To assess the utility of NanoOrange stain for studying aquatic microbial communities.

Main Methods:

  • Development of a staining protocol using NanoOrange fluorescent protein stain.

Related Experiment Videos

  • Direct observation of stained bacteria using epifluorescence microscopy.
  • Image capture and processing using a charge-coupled device (CCD) camera.
  • Comparison of NanoOrange staining results with TEM for 37 marine bacterial pure cultures.

    • Main Results:

    • NanoOrange successfully stained bacterial cell bodies, flagella, and other appendages.
    • Epifluorescence microscopy combined with CCD imaging enhanced flagella detection.
    • NanoOrange staining results correlated with TEM findings for 36 out of 37 bacterial cultures.
    • The NanoOrange method is rapid (10-15 minutes) and preserves live samples as it requires no fixation or dehydration.

    Conclusions:

    • NanoOrange provides a simple, rapid, and reliable method for demonstrating bacterial flagellation.
    • This technique is suitable for live bacterial samples and direct observation in aqueous environments.
    • NanoOrange staining holds potential for broader applications in aquatic microbial ecology for proteinaceous material detection.