Chemoreceptive control of feeding processes in hydra.

Abstract:

:Cnidarians are the simplest metazoans to exhibit satiety after feeding. When hydra are fed to repletion, they close their mouths and cease to capture prey. As feeding stops, contractions of the tentacles and body column increase. Our earlier experiments showed that a gel chromatographic fraction of prey substances inhibits prey capture. We now present evidence that the same fraction reduces the duration of mouth opening induced by reduced glutathione (GSH) and inhibits the binding of GSH to its putative receptor. The fraction also induces column contractions which are similar to those normally seen in sated animals. Prey substances, of unfractionated homogenate, also induce post-feeding tentacle contractions similar to those seen in sated animals. Gut distention does not appear to induce behavior associated with satiety. Therefore, these experiments suggest that chemoreception of prey substances induce satiety in hydra.

journal_name

Chem Senses

journal_title

Chemical senses

authors

Grosvenor W,Rhoads DE,Kass-Simon G

doi

10.1093/chemse/21.3.313

subject

Has Abstract

pub_date

1996-06-01 00:00:00

pages

313-21

issue

3

eissn

0379-864X

issn

1464-3553

journal_volume

21

pub_type

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