Alterations in diurnal pineal hydroxyindole-O-methyltransferase (HIOMT) activity in steelhead trout ( Salmo gairdneri) associated with changes in environmental background color

Alterations in diurnal pineal hydroxyindole-O-methyltransferase (HIOMT) activity in steelhead trout ( Salmo gairdneri) associated with changes in environmental background color

1. 1. The effects of dark versus light background on pineal hydroxyindole- O-methyltransferase (HIOMT) activity was studied in steelhead trout. 2. 2. In an 8l:16D photoregimen a diurnal HIOMT rhythm persisted under both background conditions. However, the relative enzymatic activities during the lig...

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Veröffentlicht in:Comparative biochemistry and physiology. C, Comparative pharmacology Comparative pharmacology, 1976, Vol.53 (1), p.33-35
Hauptverfasser: Smith, John R., Weber, Lavern J.
Format: Artikel
Sprache:eng
Schlagworte:
Acetylserotonin O-Methyltransferase - metabolism
Adaptation, Physiological
Animals
Circadian Rhythm
Color
Environment
Melatonin - biosynthesis
Methyltransferases - metabolism
Pineal Gland - enzymology
Pineal Gland - metabolism
Salmonidae - metabolism
Space life sciences
Trout - metabolism
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Zusammenfassung:1. 1. The effects of dark versus light background on pineal hydroxyindole- O-methyltransferase (HIOMT) activity was studied in steelhead trout. 2. 2. In an 8l:16D photoregimen a diurnal HIOMT rhythm persisted under both background conditions. However, the relative enzymatic activities during the light and dark portions of the photoperiod were in opposition. 3. 3. It is suggested that the background color plays an important role in the manifestation of the pineal HIOMT response to photoperiod seen in this species.
ISSN:0306-4492
DOI:10.1016/0306-4492(76)90047-2