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Related Experiment Videos

Atomic force microscopy of the cell nucleus.

L F Jiménez-García1, R Fragoso-Soriano

  • 1Laboratorio de Microscopía Electrónica y, Ciudad Universitaria, México City, D.F. 04510, México.

Journal of Structural Biology
|May 12, 2000
PubMed
Summary

Atomic force microscopy visualized the plant cell nucleus in situ, revealing detailed structures like chromatin and nucleoli. This high-resolution technique offers a new method for studying nuclear organization and function in plants.

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Area of Science:

  • Cell Biology
  • Microscopy
  • Plant Science

Background:

  • The cell nucleus in mammals and plants contains dynamic macromolecular domains crucial for DNA and RNA metabolism.
  • These nuclear domains, including chromatin and ribonucleoprotein structures, are typically visualized using light and electron microscopy.
  • Plant nuclei exhibit specific DNA arrangements, such as chromocentric and reticulated nuclei.

Purpose of the Study:

  • To investigate the in situ structure of the plant cell nucleus using atomic force microscopy (AFM).
  • To compare AFM imaging of plant nuclei with that of mammalian cells.
  • To evaluate AFM as a high-resolution tool for nuclear structure analysis.

Main Methods:

  • Samples of Lacandonia schismatica and Ginkgo biloba were prepared similarly to electron microscopy techniques.

Related Experiment Videos

  • Unstained semithin sections were mounted on glass slides for AFM analysis.
  • Normal rat kidney cells were examined using the same AFM approach in contact mode.

    • Main Results:

    • Atomic force microscopy successfully generated recognizable images of the nuclear envelope, pores, chromatin, and nucleolus.
    • Reticulated chromatin structures were observed in Lacandonia schismatica.
    • Distinct textures within the nucleolus of Ginkgo biloba suggested the presence of subcompartments.

    Conclusions:

    • Atomic force microscopy provides a novel, high-resolution method for in situ analysis of nuclear structure.
    • AFM allows for the visualization of intricate nuclear components in plant cells.
    • This technique offers new possibilities for understanding nuclear organization and function.