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.
|Number of pages||5|
|Publication status||Published - Apr 4 2002|
- Cell division
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)