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  • Title: [Patterns of mechanical stress at the successive stages of early development of frog].
    Author: Belousov LV, Dorfman IaG, Cherdantsev VG.
    Journal: Ontogenez; 1976; 7(2):115-22. PubMed ID: 1026860.
    Abstract:
    The immediate relaxation deformations have been studied in the embryonic frog tissues from the late blastula stage till the early tail bud stage. As a result, the maps of mechanical stresses were constructed which were characterized by the existence of distinct tension-lines dissecting the embryonic tissues (cross-lines). A few discrete moments of development were established when new cross-lines formed or the previous ones disappeared; they are separated by the topologically invariant periods of development. The cross-lines play an important role in morphogenesis in that they determine the ways of active cell migration and trace the boundaries between different anlages. The orientation of the cross-lines coincides, as a rule, with the direction of predominant tension of tissues during the preceding topologically invariant period of development.
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