Document Detail

Circadian G2 arrest as related to circadian gating of cell population growth in Euglena.
MedLine Citation:
PMID:  15821024     Owner:  NLM     Status:  MEDLINE    
Cell population growth is gated to occur in particular circadian phases, which has been known for over four decades in various organisms including cyanobacteria and human. However, little is known as to which cell cycle phases from G1 to M are primarily regulated by the circadian rhythm or when in a circadian cycle this primary regulation takes place. We report here that in the flagellate alga Euglena gracilis grown photoautotrophically, the circadian rhythm primarily prevented developmentally matured G2 cells from progressing to mitosis, such that cell population growth occurred only during subjective night. In addition, we found that the circadian rhythm also arrests G1-to-S and S-to-G2 transitions at particular circadian phases.
Aoen Bolige; Shin-Ya Hagiwara; Yulan Zhang; Ken Goto
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-04-08
Journal Detail:
Title:  Plant & cell physiology     Volume:  46     ISSN:  0032-0781     ISO Abbreviation:  Plant Cell Physiol.     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2005-07-04     Completed Date:  2005-09-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9430925     Medline TA:  Plant Cell Physiol     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  931-6     Citation Subset:  IM    
Laboratory of Biological Rhythms, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, 080-8555 Japan.
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MeSH Terms
Cell Cycle
Circadian Rhythm
DNA Replication
Euglena gracilis / cytology*,  growth & development,  metabolism
G2 Phase

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