Effect of long or short photoperiod on pineal melatonin content in the white-footed mouse, Peromyscus leucopus

L. J. Petterborg, B. A. Richardson, R. J. Reiter

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Adult white-footed mice were maintained under either a long photoperiod (LP, LD 16:8, lights out at 2100) or a short photoperiod (SP, LD 8:16, lights out at 1700) for six weeks. Subgroups from each lighting regime were killed at specific times over a 24 hour period. Pineal radioimmunoassayable melatonin levels were significantly elevated at night compared to daytime values. Pineal melatonin content appears to be elevated for a longer period of time in the SP mice than in the LP animals. The apparent increased melatonin production observed in white-footed mice maintained under short and reproductively repressive daylengths may help to explain the ability of chronically available exogenous melatonin to cause gonadal atrophy in this species.

Original languageEnglish (US)
Pages (from-to)1623-1627
Number of pages5
JournalLife Sciences
Volume29
Issue number16
DOIs
StatePublished - Oct 19 1981

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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