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Embedding plant tissue with plastic using high pressure: a new method for light and electron microscopy

R D Warmbrodt, E Fritz

    Stain Technology
    |September 1, 1981
    PubMed
    Summary

    A new high-pressure embedding technique improves plant tissue preparation for microscopy. This method enhances infiltration and preserves tissue quality for both light and electron microscopy applications.

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    Area of Science:

    • Plant Science
    • Microscopy
    • Materials Science

    Background:

    • Standard embedding methods present challenges for "hard-to-embed" plant tissues.
    • Difficulties in infiltration and preservation affect image quality in light and electron microscopy.

    Purpose of the Study:

    • To develop and evaluate a novel high-pressure embedding technique for challenging plant tissues.
    • To assess the efficacy of the technique for both light and electron microscopy.

    Main Methods:

    • Utilized a modified Quickfit Rotaflo Valve and low heat to generate high pressure for tissue infiltration.
    • Employed propylene oxide and plastic for embedding freeze-dried plant material.
    • The process from dehydration to polymerization takes 6 days.

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    Main Results:

    • Achieved satisfactory staining of thick sections (1-2 micrometer) with toluidine blue.
    • Thin sections for electron microscopy stained well with standard uranyl acetate and lead citrate treatments.
    • Thin sections demonstrated stability under electron microscope beams.
    • Tissue preservation quality was comparable to standard embedding methods.

    Conclusions:

    • The high-pressure embedding technique effectively overcomes challenges with hard-to-embed plant tissues.
    • This method provides high-quality preservation suitable for both light and electron microscopy.
    • The technique offers a viable alternative for researchers encountering difficulties with conventional embedding.