Influence of physiological state on indices of respiration rate in protozoa

1. 1. Respiratory electron transport system activity (ETS) was determined in cell-free homogenates of three protozoan species. 2. 2. Protozoa in various physiological states were investigated. 3. 3. Maximum ETS activity was usually associated with maximum rates of growth and intact-cell respiration...

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Published inComparative biochemistry and physiology. A, Comparative physiology Vol. 74; no. 2; pp. 211 - 219
Main Authors Finlay, B.J., Span, Arja, Ochsenbein-Gattlen, C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1983
Subjects
Paramecium caudatum
Tetrahymena pyriformis
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Summary:1. 1. Respiratory electron transport system activity (ETS) was determined in cell-free homogenates of three protozoan species. 2. 2. Protozoa in various physiological states were investigated. 3. 3. Maximum ETS activity was usually associated with maximum rates of growth and intact-cell respiration (R). 4. 4. Some variation in the ETS/R ratio may be attributed to time lags while the macromolecular components of the ETS system are synthesized. In these periods the ratio approaches the theoretical minimum value of unity. 5. 5. The maintenance of a relatively constant ETS/R ratio in most physiological states is characteristic of the larger Protozoa and zooplankton. Variation in the ratio in a small flagellate is typical of most microorganisms.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0300-9629
DOI:10.1016/0300-9629(83)90590-X