Melatonin in the unicellular Tetrahymena pyriformis: Effects of different lighting conditions

L. Köhidai, O. Vakkuri, M. Keresztesi, J. Leppäluoto, G. Csaba

Research output: Contribution to journalArticle

23 Citations (Scopus)


Melatonin content in the cellular fraction and medium of Tetrahymena pyriformis GL cultures was measured at different time points of light and dark exposures. Tetrahymena produced, stored and secreted immunoreactive melatonin, which in displacement and HPLC studies, behaved like synthetic melatonin. There was not a continuous secretion of melatonin produced by the cells. In contrast to this, storage of melatonin was observed, which was more expressed in dark conditions. Prolonged light exposure suppressed melatonin production and secretion alike, however it did not block it completely,

Original languageEnglish
Pages (from-to)269-272
Number of pages4
JournalCell biochemistry and function
Issue number3
Publication statusPublished - Aug 26 2002



  • Evolution
  • Light-dark exposure
  • Melatonin
  • Tetrahymena

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

Cite this