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Related Experiment Video

Updated: May 30, 2026

Generation of Transgenic Hydra by Embryo Microinjection

Generation of Transgenic Hydra by Embryo Microinjection

Published on: September 11, 2014

Axis formation in hydra.

¹Department of Developmental and Cell Biology, University of California, Irvine, California 92697, USA. hrbode@uci.edu

Annual Review of Genetics

|August 9, 2011

Summary

This summary is machine-generated.

Hydra axis formation relies on a head organizer producing signals that form gradients, maintaining the animal's structure. The Wnt pathway is crucial for establishing and sustaining this organizer.

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Generation and Long-term Maintenance of Nerve-free Hydra

Generation and Long-term Maintenance of Nerve-free Hydra

Published on: July 7, 2017

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Last Updated: May 30, 2026

Generation of Transgenic Hydra by Embryo Microinjection

Generation of Transgenic Hydra by Embryo Microinjection

Published on: September 11, 2014

Generation and Long-term Maintenance of Nerve-free Hydra

Generation and Long-term Maintenance of Nerve-free Hydra

Published on: July 7, 2017

Area of Science:

Developmental Biology
Regenerative Biology
Cell Signaling

Background:

Hydra exhibit a simple body plan along an oral-aboral axis.
Tissue dynamics involve continuous production and loss of cells.
Axis formation and patterning are critical for organismal integrity.

Purpose of the Study:

To elucidate the mechanisms controlling axis formation and maintenance in Hydra.
To understand the role of the head organizer and its signaling molecules.
To investigate the involvement of the canonical Wnt pathway in head organizer function.

Main Methods:

Analysis of Hydra's structural organization and tissue dynamics.
Investigation of signaling gradients originating from the head organizer.
Examination of the canonical Wnt pathway's role in organizer establishment.

Main Results:

The head organizer at the apex produces head activator and inhibitor signals.
These signals form descending gradients along the body column, controlling axial patterning.
The canonical Wnt pathway is essential for setting up and maintaining the head organizer.

Conclusions:

Hydra axis formation is a dynamic process regulated by signaling gradients from the head organizer.
The interplay between head activator and inhibitor signals maintains axial patterning.
Canonical Wnt signaling is a key pathway in establishing the primary organizing center.