Circadian Rhythm of the Prokaryote Synechococcus sp. RF-1.
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.
Huang
T C
TC
Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan 11529, Republic of China.
Tu
J
J
Chow
T J
TJ
Chen
T H
TH