The current state and problems of circadian clock studies in cyanobacteria

H. Iwasaki*, T. Kondo

*Corresponding author for this work

Research output: Contribution to journalShort surveypeer-review

44 Citations (Scopus)


Circadian rhythms have been observed in innumerable physiological processes in most of organisms. Recent molecular and genetic studies on circadian clocks in many organisms have identified and characterized several molecular regulatory factors that contribute to generation of such rhythms. The cyanobacterium is the simplest organism known to harbor circadian clocks, and it has become one of most successful model organisms for circadian biology. In this review, we will briefly summarize physiological observations and consideration of circadian rhythms in cyanobacteria, molecular genetics of the clock using Synechococcus, and current knowledge of the input and output pathways that support the cellular circadian system. Finally, we will document some current problems in the studies on the cyanobacterial circadian clock.

Original languageEnglish
Pages (from-to)1013-1020
Number of pages8
JournalPlant and Cell Physiology
Issue number9
Publication statusPublished - 2000
Externally publishedYes


  • Circadian rhythm
  • Feedback loop
  • Kai genes
  • SasA
  • Synechococcus

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology


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