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 Sensesjournal_title
Chemical sensesauthors
Grosvenor W,Rhoads DE,Kass-Simon Gdoi
10.1093/chemse/21.3.313subject
Has Abstractpub_date
1996-06-01 00:00:00pages
313-21issue
3eissn
0379-864Xissn
1464-3553journal_volume
21pub_type
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