Circadian Rhythm of the Prokaryote Synechococcus sp. RF-1 |
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| Authors: | Huang T C Tu J Chow T J Chen T H |
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| Affiliation: | Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan 11529, Republic of China. |
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| Abstract: | The prokaryotic Synechococcus sp. RF-1 exhibited a nitrogen fixation circadian rhythm with characteristics remarkably similar to the circadian rhythm of eukaryotes. The rhythm had a free-running period of about 24 hours when the length of the preen-trained cycle did not differ too much from 24 hours, and it was insensitive to changes in temperature from 22°C to 33°C. Because the endogenous rhythm of nitrogen fixation was not affected by a phase-shift of its previous cycles, the circadian rhythm in Synechococcus sp. RF-1 was not considered to be controlled simply by a feedback mechanism. |
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