Title:
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Hydra Molecular Network Reaches Criticality at the Symmetry-Breaking Axis-Defining Moment
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Author:
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Soriano i Fradera, Jordi; Colombo, Cyril; Ott, Albrecht
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Other authors:
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Universitat de Barcelona |
Abstract:
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We study biological, multicellular symmetry breaking on a hollow cell sphere as it occurs during hydra regeneration from a random cell aggregate. We show that even a weak temperature gradient directs the axis of the regenerating animal but only if it is applied during the symmetry-breaking moment. We observe that the spatial distribution of the early expressed, head-specific gene k s 1 has become scale-free and fractal at that point. We suggest the self-organized critical state to reflect long range signaling, which is required for axis definition and arises from cell next-neighbor communication. |
Subject(s):
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-Física de partícules -Experiments -Particle physics -Experiments |
Rights:
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(c) American Physical Society, 2006
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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