Journal ArticleDOI
A four-variable model for the pattern-forming mechanism in Hydra.
TLDR
A generalized Gierer-Meinhardt model has been used to account for the transplantation experiments in Hydra and a cross inhibition between the two organizing centres is assumed to be the only mode of interaction in setting up a stable morphogen distribution for the pattern formation in Hydra.Abstract:
A generalized Gierer-Meinhardt model has been used to account for the transplantation experiments in Hydra. In this model, a cross inhibition between the two organizing centres (namely, head and foot) are assumed to be the only mode of interaction in setting up a stable morphogen distribution for the pattern formation in Hydra.read more
Citations
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Journal ArticleDOI
Emergent complexity of the cytoskeleton: from single filaments to tissue
Florian Huber,Jörg Schnauß,Susanne Rönicke,Philipp Rauch,Karla Müller,C. Fütterer,Josef A. Käs +6 more
TL;DR: This review aims at introducing the physics of the cytoskeleton ranging from single biopolymer filaments to multicellular organisms, with the focus on the intertwined nature of the different physical scales that give rise to numerous emergent properties by means of self-organization or self-assembly.
Journal ArticleDOI
A model for pattern formation of hypostome, tentacles, and foot in hydra: how to form structures close to each other, how to form them at a distance.
TL;DR: The model shows that systems which suggest a positional information scheme may be realized by a set of hierarchically coupled pattern forming systems: a structure generates the precondition for a second structure but excludes this structure locally in this way, a well-regulated neighborhood of structures is enforced.
Book ChapterDOI
Hydrozoa metamorphosis and pattern formation.
TL;DR: This chapter discusses metamorphosis from the larval to the polyp state and pattern formation in larvae, polyps, and colonies in hydrozoa, including regeneration and transplantation techniques, methods of molecular biology, and biochemical methods.
Journal ArticleDOI
A model for budding in hydra: pattern formation in concentric rings.
TL;DR: An alternative model of pattern formation in Hydra is presented to overcome problems, in particular budding, the asexual way of reproduction is not understood and computer-simulation experiments show basic features of budding, regeneration and transplantation.
Journal ArticleDOI
Transplantation phenomena in hydra: Cooperation of position-dependent and structure-dependent factors determines the transplantation result
Hiroshi Shimizu,Yasuji Sawada +1 more
TL;DR: It was found that transplantation experiments carried out by the two procedures gave significantly different results and the frequency of head formation by the transplanted tissue on the host was significantly higher by the lateral than by the axial grafting procedure.
References
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Journal ArticleDOI
The Chemical Basis of Morphogenesis
TL;DR: In this article, it is suggested that a system of chemical substances, called morphogens, reacting together and diffusing through a tissue, is adequate to account for the main phenomena of morphogenesis.
Journal ArticleDOI
A theory of biological pattern formation.
Alfred Gierer,Hans Meinhardt +1 more
TL;DR: It is shown that relatively simple molecular mechanisms based on auto- and cross catalysis can account for a primary pattern of morphogens to determine pattern formation of the tissue, and the theory is applied to quantitative data on hydra and is shown to account for activation and inhibition of secondary head formation.
Book
Thermodynamic Theory of Structure, Stability and Fluctuations
Paul Glansdorff,Ilya Prigogine +1 more
Journal ArticleDOI
Diffusion in Embryogenesis
TL;DR: A simple order-of-magnitude calculation suggests that diffusion may be the underlying mechanism in establishing morphogenetic gradients in embryonic development.
Journal ArticleDOI
Dissipative structure: an explanation and an ecological example.
Lee A. Segel,Julius L. Jackson +1 more
TL;DR: This study suggests that diffusive instabilities should also be sought in ecological interactions by presenting an example of their occurrence when cooperating prey interact with predators.