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Related Experiment Videos

Mutations, epimutations, and the developmental programming of the maize Suppressor-mutator transposable element.

N Fedoroff, P Masson, J A Banks

    Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
    |May 1, 1989
    PubMed
    Summary

    The maize Suppressor-mutator (Spm) transposable element

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    Area of Science:

    • Genetics
    • Molecular Biology
    • Epigenetics

    Background:

    • The maize Suppressor-mutator (Spm) transposable element is a key genetic component in maize.
    • Understanding its regulation is crucial for comprehending plant development and differentiation.
    • Epigenetic modifications play a significant role in controlling transposable element activity.

    Purpose of the Study:

    • To investigate the structure, function, and epigenetic regulation of the maize Suppressor-mutator (Spm) transposable element.
    • To explore the relationship between Spm's epigenetic programming and plant developmental events.
    • To characterize unconventional reversible genetic changes (epimutations) associated with Spm.

    Main Methods:

    • Genetic characterization of deletion mutations in Spm.

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  • Molecular characterization of Spm element behavior.
  • Analysis of epigenetic mechanisms governing Spm inactivation and differential expression.

    • Main Results:

    • Detailed information on Spm structure, function, and regulation has been obtained.
    • An epigenetic mechanism capable of stable Spm inactivation has been identified.
    • Heritable programs of differential Spm expression during development have been specified.

    Conclusions:

    • The Spm element is subject to epigenetic control that influences its activity.
    • Spm's epigenetic programming is linked to determinative events in plant development.
    • Epimutations represent a novel form of reversible genetic change regulated by Spm.