Impact of melatonin on the cell division, phagocytosis and chemotaxis of Tetrahymena pyriformis

László Köhidai, Olli Vakkuri, Márk Keresztesi, Éva Pállinger, Juhani Leppäluoto, György Csaba

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9 Citations (Scopus)


Melatonin is produced, stored and secreted by Tetrahymena. In the present experiments the effects of exogeneously given melatonin to Tetrahymena pyriformis was studied. Melatonin, between 10-6 and 10-10 M concentrations, significantly stimulated the E. coli phagocytosis of Tetrahymena. Melatonin also suppressed the multiplication of Tetrahymena cultures. Melatonin had chemotactic effect depending on illumination: it was chemoattractant in light and chemorepellent in darkness at the concentration of 10-11 M. Functional and evolutionary conclusions are discussed.

Original languageEnglish
Pages (from-to)85-89
Number of pages5
JournalActa Protozoologica
Issue number1
Publication statusPublished - Apr 4 2002



  • Cell division
  • Chemotaxis
  • Evolution
  • Melatonin
  • Phagocytosis
  • Tetrahymena

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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