title: A modern circadian clock in the common angiosperm ancestor of monocots and eudicots.
abstract: The circadian clock enhances fitness through temporal organization of plant gene expression, metabolism and physiology. Two recent studies, one in BMC Evolutionary Biology, demonstrate through phylogenetic analysis of the CCA1/LHY and TOC1/PRR gene families that the common ancestor of monocots and eudicots had components sufficient to construct a circadian clock consisting of multiple interlocked feedback loops.
authors.affiliation: Department of Biological Sciences, 6044 Gilman Laboratories, Dartmouth College, Hanover, New Hampshire 03755, USA. mcclung@dartmouth.edu
authors.forename: C Robertson
authors.initials: CR
authors.lastname: McClung
mesh_terms: D029681:Arabidopsis Proteins / Q000235:genetics / Q000502:physiology; D001683:Biological Clocks / Q000235:genetics* / Q000502:physiology; D002940:Circadian Rhythm / Q000235:genetics / Q000502:physiology*; D019143:Evolution, Molecular; D019684:Magnoliopsida / Q000235:genetics / Q000502:physiology*; D008954:Models, Biological; D005810:Multigene Family / Q000235:genetics* / Q000502:physiology; D010802:Phylogeny; D014157:Transcription Factors / Q000235:genetics / Q000502:physiology
chemical_list: D029681:Arabidopsis Proteins; C114425:CCA1 protein, Arabidopsis; C411822:TOC1 protein, Arabidopsis; D014157:Transcription Factors
references.citation: Plant Cell. 2010 Mar;22(3):594-605
references.pmid: 20233950
references.citation: Mol Cells. 2007 Apr 30;23(2):145-53
references.pmid: 17464190
references.citation: Plant Cell. 2007 Nov;19(11):3462-73
references.pmid: 18055606
references.citation: Annu Rev Plant Biol. 2009;60:357-77
references.pmid: 19575587
references.citation: Science. 2009 Mar 13;323(5920):1481-5
references.pmid: 19286557
references.citation: Science. 2003 Nov 7;302(5647):1049-53
references.pmid: 14605371
references.citation: Plant Cell Physiol. 2003 Nov;44(11):1229-36
references.pmid: 14634161
references.citation: Science. 2005 Nov 11;310(5750):1031-4
references.pmid: 16284181
references.citation: BMC Evol Biol. 2010 May 01;10:126
references.pmid: 20433765
references.citation: Genetics. 2009 Sep;183(1):325-35
references.pmid: 19581446
references.citation: Theor Appl Genet. 2007 Sep;115(5):721-33
references.pmid: 17634915
references.citation: Curr Opin Plant Biol. 2008 Oct;11(5):514-20
references.pmid: 18678522
references.citation: Annu Rev Genet. 2006;40:409-48
references.pmid: 17094740
references.citation: PLoS Genet. 2008 Feb;4(2):e14
references.pmid: 18248097
references.citation: Genome Biol. 2008;9(8):R130
references.pmid: 18710561
references.citation: New Phytol. 2009 Mar;181(4):808-819
references.pmid: 19140936