Journal Article

The Current State and Problems of Circadian Clock Studies in Cyanobacteria

Hideo Iwasaki and Takao Kondo

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 41, issue 9, pages 1013-1020
Published in print September 2000 | ISSN: 0032-0781
Published online September 2000 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcd024
The Current State and Problems of Circadian Clock Studies in Cyanobacteria

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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.

Keywords: Key words: Circadian rhythm — Feedback loop — kai genes — SasA — Synechococcus.; Abbreviations: LD, light/dark; LL, continuous light; CT, circadian time; TTO, transcription/translation-based feedback oscillator.

Journal Article.  6025 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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