Actions of head activator and head inhibitor during regeneration in hydra

Kemmner, Wolfgang; Schaller, H. Chica

doi:10.1111/j.1432-0436.1984.tb01379.x

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Actions of head activator and head inhibitor during regeneration in hydra

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Kemmner, Wolfgang
Max Planck Institute for Medical Research, Max Planck Society;

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Schaller, H. Chica
Max Planck Institute for Medical Research, Max Planck Society;

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https://www.sciencedirect.com/science/article/pii/S0301468111616307/pdf?md5=c56a98fc8ae3c6e4c68d97f6e970ce3d&pid=1-s2.0-S0301468111616307-main.pdf
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Citation

Kemmner, W., & Schaller, H. C. (1984). Actions of head activator and head inhibitor during regeneration in hydra. Differentiation, 26(1-3), 91-96. doi:10.1111/j.1432-0436.1984.tb01379.x.

Cite as: https://hdl.handle.net/21.11116/0000-0005-D9AC-5

Abstract

Head regeneration in hydra is initiated by an extensive release of head inhibitor and head activator from tissue close to the cut surface. Release of both substances is less extensive after removal of the foot. Incubation of regenerating animals in medium with head inhibitor blocks not only regeneration of a new head but also release of head activator and head inhibitor. No effect was found of the head activator on the release of both substances. Release of head-specific substances is thus controlled by the inhibitor alone. Cellular determination in a head-specific direction and the production of new sources for head factors requires head activator.