Embryogenesis in Hydra
نویسندگان
چکیده
منابع مشابه
Discovery of genes expressed in Hydra embryogenesis.
Hydra's remarkable capacity to regenerate, to proliferate asexually by budding, and to form a pattern de novo from aggregates allows studying complex cellular and molecular processes typical for embryonic development. The underlying assumption is that patterning in adult hydra tissue relies on factors and genes which are active also during early embryogenesis. Previously, we reported that in Hy...
متن کاملHydra
What is Hydra? Hydra is a member of the animal phylum Cnidaria. This phylum includes corals, sea anemones and jellyfish. While most cnidarians are marine, Hydra is unusual in that it lives exclusively in fresh water. Hydra was first described by Antoni van Leeuwenhoek (1632– 1723) in a letter he sent to the Royal Society on Christmas day, 1702. The letter included a red chalk drawing of Hydra o...
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Stable endosymbiosis depends upon balanced growth of the symbionts. In green hydra, coincident patterns of host and algal mitotic index suggest that coordinated reproduction provides for balanced growth. However, when hydra shrink during food shortage, the population of endosymbiotic algae in a green hydra must likewise decline in size. Thus far, no mechanism of reducing the size of the endosym...
متن کاملAxial patterning in hydra.
Morphogen gradients play an important role in pattern formation during early stages of embryonic development in many bilaterians. In an adult hydra, axial patterning processes are constantly active because of the tissue dynamics in the adult. These processes include an organizer region in the head, which continuously produces and transmits two signals that are distributed in gradients down the ...
متن کاملEpithelial morphogenesis in hydra
The extracellular matrix (ECM) functions as both a structural entity and as a signaling entity that has been reported to modulate the differentiation of cells associated with it, and the shape of cells and organs during early embryogenesis and later histogenesis (Chen and Ingber 1999; Davis et al., 2000; Relan and Schuger 1999; Streuli, 1999). It is now accepted that cellECM interactions are fu...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1997
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1542745