Clarifying tetrapod embryogenesis by a dorso-ventral analysis of the tissue flows during early stages of chicken development

Bio Systems
V Fleury

Abstract

The formation of an animal body remains largely a mystery. It is still not clear whether anything like an organization plan or an "archetype" as coined by Darwin himself, actually exists, or whether animals are organized by a succession of stop-and-go genetic, non-linear, instructions with no global pattern. Nevertheless, it was recognized long ago that the early stages of amniote development consist of large scale rotatory movements over a discoidal blastula (Wetzel, 1924). Such rotatory movements reshuffle a mass inside a finite volume, and thus may have to bear physical conservation laws which contribute to establish the plan of animals in a global fashion. In this article I use dual dorso-ventral imaging of the chicken blastula, to show experimentally that the global movement of early vertebrate embryogenesis is organized with a very simple topology, around and away of a series of hyperbolic points in the vector flow of movement. At the first hyperbolic point, a layer of tissue (the mesoderm) ingresses and moves as a viscous sheet radially. It is found that the sheet flows away with a scaling law for the radius R(t)∼exp(t/τ). Also, the movement of this mesoderm changes the flow on the other layer (the ectoderm) by the princ...Continue Reading

References

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Citations

Feb 26, 2013·Journal of Biomechanics·Y ChélinB Maurin
Sep 14, 2013·Orthopaedics & Traumatology, Surgery & Research : OTSR·V Fleury, UNKNOWN French Society of Pediatric Orthopaedics
Mar 28, 2017·Nature Cell Biology·Michael SmutnyCarl-Philipp Heisenberg
Jun 16, 2016·Development·Rajprasad LoganathanCharles D Little
Jul 25, 2019·Antioxidants·Peter F SuraiMichael T Kidd
Sep 15, 2016·Physical Review. E·Vincent FleuryAlexis Peaucelle
Aug 17, 2019·The European Physical Journal. E, Soft Matter·Vincent Fleury, Ameya Vaishnavi Murukutla
Jun 16, 2021·Theory in Biosciences = Theorie in Den Biowissenschaften·Vincent FleuryOlivia Plateau
Jun 21, 2020·Mechanisms of Development·Guillermo Serrano Nájera, Cornelis J Weijer

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