Hydroxyindole-O-methyltransferase (HIOMT) activity and the uptake of 3H-melatonin in the lamprey, Geotria australis gray

  • Joss J
  • 5

    Readers

    Mendeley users who have this article in their library.
  • 29

    Citations

    Citations of this article.

Abstract

HIOMT activity in the pineal complex of Geotria australis ammocoetes was found to reach a peak, 4-5-fold that of the basal value, between 2 and 3 hr after the onset of darkness. This short burst of HIOMT activity was associated with aggregation of pigment in the melanophores causing pallor in the ammocoetes.3H-Melatonin was taken up by all the tissues examined (pineal complex, pituitary, endostyle, brain, liver, gut and tail muscle). It is concluded from these results that the pineal complex in Geotria australis is a photoneuroendocrine transducer conveying diurnal information to other body tissues. © 1977.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Jean M P Joss

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free