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Related Experiment Videos

Morphomechanical programming of morphogenesis in cnidarian embryos.

Yulia A Kraus1

  • 1Department of Evolutionary Biology, Biological Faculty, Moscow State University, Moscow, Russia. yulia_kraus@hydrozoa.org

The International Journal of Developmental Biology
|February 16, 2006
PubMed
Summary

Early marine hydroid development involves two morphogenesis types, driven by cell changes or coordinated movements. This process creates an "epigenetic program" guiding stable pattern formation through morphomechanical programming.

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Area of Science:

  • Developmental Biology
  • Marine Biology
  • Cell Biology

Background:

  • Pattern formation is crucial for early development.
  • Marine colonial hydroids, like Dynamena pumila, offer a model for studying morphogenesis.
  • Understanding the factors controlling spatial structure development is essential.

Purpose of the Study:

  • To investigate the factors governing pattern formation in Dynamena pumila morphogenesis.
  • To distinguish and characterize different types of morphogenesis.
  • To elucidate the role of epigenetic factors in stable spatial structure reproduction.

Main Methods:

  • Distinguished two types of morphogenesis based on cellular behavior.
  • Analyzed developmental stages as sequential cascades of events.

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  • Identified epigenetic factors influencing pattern formation.

    • Main Results:

    • Two distinct modes of morphogenesis were identified: one involving cell shape/axis changes, the other active cell rearrangements.
    • Morphogenesis proceeds as a cascade where each stage informs the next.
    • A stable "epigenetic program" for pattern formation emerges during development.

    Conclusions:

    • Dynamena pumila morphogenesis follows a predictable, cascading sequence.
    • Epigenetic factors, including embryo geometry, heterogeneity, and mechanical stresses, act as a "morphomechanical program".
    • This program ensures the stable reproduction of spatial structures during development.