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Concomitance of circadian and circa‐4‐hour ultradian rhythms inEuglena gracilis

 

作者: Ivonne Balzer,   U. Neuhaus‐Steinmetz,   Edelgard Quentin,   M. van Wüllen,   R. Hardeland,  

 

期刊: Journal of Interdisciplinary Cycle Research  （Taylor Available online 1989）
卷期: Volume 20, issue 1  

页码: 15-24

 

ISSN:0022-1945

 

年代: 1989

 

DOI:10.1080/09291018909359994

 

出版商: Taylor & Francis Group

 

关键词: cell shape;circadian rhythms;Euglena;phototaxis;protein synthesis;tyrosine aminotransferase;ultradian rhythms

 

数据来源: Taylor

 

摘要:

Stationary cultures ofEuglenawere investigated in LD 12:12, LD 0.25:1.75, and in LL, at a temperature of 23 °C. In these conditions, protein synthesis, cell shape and/or phototaxis exhibited circadian rhythmicity, whereas tyrosine aminotransferase activity showed a circa‐4‐h periodicity. Simultaneous measurements of cell shape and tyrosine aminotransferase, carried out in LL, at either 27.5 or 18 °C, demonstrated concomitance of circadian and ultradian rhythms in the same cell cultures.

 

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