Impact of histamine treatment and feeding on the hydrolytic enzyme level of Tetrahymena in culture and in conditions of starvation

P. Kovács, G. Csaba

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3 Citations (Scopus)


1. 1. The unicellular Tetrahymena pyriformis contains and also produces hydrolytic enzymes, such as glucosidase, phosphatase and glucosaminidase. 2. 2. Return of Tetrahymena to plain medium after treatment with bacteria alone, histamine alone or bacteria plus histamine was equally followed by persistence of the hydrolytic enzyme activity around the control value and an activity increase at about 60 min. 3. 3. Incubation of Tetrahymena in salt (Losina-Losinsky) solution after the applied treatment accounted for reduction to practically zero of the glucosidase and glucosaminidase activities, whereas the phosphatase activity tended to increase rather than to decrease in both the bacterium-treated and histamine-treated cultures. 4. 4. The enzyme activity patterns of the Tetrahymena cells pretreated (imprinted) with histamine did not differ from the control pattern either after re-exposure to histamine or after feeding with bacteria, but showed a uniformization of the activity pattern and a considerable decrease in enzyme activity on incubation (starvation) in salt (Losina-Losinsky) solution.

Original languageEnglish
Pages (from-to)429-433
Number of pages5
JournalComparative Biochemistry and Physiology -- Part B: Biochemistry and
Issue number3
Publication statusPublished - 1990


ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Molecular Biology

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