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Avian feather development: relationships between morphogenesis and keratinization.

A R Haake, G König, R H Sawyer

    Developmental Biology
    |December 1, 1984
    PubMed
    Summary
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    Avian feather development involves specific keratin expression patterns. Beta keratins appear in the feather sheath and barb ridges during morphogenesis, while alpha keratins decrease after hatching.

    Area of Science:

    • Developmental biology
    • Molecular biology
    • Histology

    Background:

    • Epidermal-dermal interactions guide avian skin derivative morphogenesis.
    • Alpha and beta keratin expression is crucial for feather development.

    Purpose of the Study:

    • To investigate the relationship between embryonic feather morphogenesis and feather alpha/beta keratin expression.

    Main Methods:

    • Routine histology
    • Indirect immunofluorescence
    • SDS-PAGE (Sodium dodecyl sulfate-polyacrylamide gel electrophoresis)

    Main Results:

    • Beta keratins initially expressed in the feather sheath, then detected in barb ridges post-morphogenesis.
    • Beta keratinization occurs in gradients from feather apex to base and barb ridge periphery to interior.

    Related Experiment Videos

  • Increased major feather beta keratin polypeptides observed with beta keratinization onset.
  • Alpha keratins present in early periderm and feather sheath, reduced post-hatching.

    • Conclusions:

    • Feather morphogenesis is closely linked to the spatiotemporal expression of beta keratins.
    • Distinct keratinization patterns correlate with cell differentiation during feather development.