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Critical Behavior and Axis Defining Symmetry Breaking in Hydra Embryonic Development
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The formation of a hollow cellular sphere is often one of the first steps of multicellular embryonic development. In the case of Hydra, the sphere breaks its initial symmetry to form a foot-head axis. During this process a gene, ks1, is increasingly expressed in localized cell domains whose size distribution becomes scale-free at the axis-locking moment. We show that a physical model based solely on the production and exchange of ks1-promoting factors among neighboring cells robustly reproduces the scaling behavior as well as the experimentally observed spontaneous and temperature-directed symmetry breaking.
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GAMBA, Andrea, et al. Critical Behavior and Axis Defining Symmetry Breaking in Hydra Embryonic Development. Physical Review Letters. 2012. Vol. 108, num. 15, pags. 158103-1-158103-5. ISSN 0031-9007. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/46884