Oscillations of Respiration, Adenine Nucleotide Levels and Heat Evolution in Synchronous Cultures of Tetrahymena pyriformis ST Prepared by Continuous-flow Selection
- 1 May 1978
- journal article
- research article
- Published by Microbiology Society in Journal of General Microbiology
- Vol. 106 (1) , 19-26
- https://doi.org/10.1099/00221287-106-1-19
Abstract
Respiration rates, adenine nucleotide levels and heat production were measured during exponential asynchronous growth of T. pyriformis and in synchronous cultures prepared by continuous-flow selection. In synchronous cultures rates of O2 uptake rose to maxima 3 times in each cell cycle. The ATP pool oscillated in phase with respiratory activity. The ADP and AMP pools oscillated in phase with each other, but out of phase with ATP, and the rate of heat production also showed fluctuations. Values calculated for adenylate energy charge were low, increasing from < 0.2 to > 0.4 during the mid-exponential phase of growth in an asynchronous culture and oscillating over a range of 0.34-0.47 in a synchronous culture.Keywords
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