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Adaptation of microorganisms to the environmental condition Yasuo NAKAOKA 1 , Fumio OOSAWA 1 1Department of Biophysical Engineering, Faculty of Engineering science, Osaka University pp.951-958
Published Date 1978/8/10
DOI https://doi.org/10.11477/mf.1431904985
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Abstract

Paramecium cells show thermotaxis. When placed in a temperature gradient, they come to the temperature where they were cultured. In the gradient, those swimming toward the culture temperature show low frequency of turning, whereas those swimming in the opposite direction show high frequency of turning.

Swimming cells sense the temperature gradient as the temporal change of temperature. When the temperature is suddenly dropped from theculture temperature to lower temperature, the turning frequency is transiently increased and when it is recovered to the culture temperature, the frequency is transiently decreased.


Copyright © 1978, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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