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. 1990 Feb;92(2):531-3.
doi: 10.1104/pp.92.2.531.

Circadian Rhythm of the Prokaryote Synechococcus sp. RF-1

T C Huang  1 , J Tu, T J Chow, T H Chen
Affiliations

Circadian Rhythm of the Prokaryote Synechococcus sp. RF-1

T C Huang et al. Plant Physiol. 1990 Feb.

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 degrees C to 33 degrees 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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