Tansley review no. 103 -: Biological clocks in Arabidopsis thaliana

被引:33
作者
Millar, AJ [1 ]
机构
[1] Univ Warwick, Dept Biol Sci, Coventry CV4 7AL, W Midlands, England
关键词
circadian rhythm; transcriptional control; photoreceptor; photoperiodism;
D O I
10.1046/j.1469-8137.1999.00349.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Biological rhythms are ubiquitous in eukaryotes, and the best understood of these occur with a period of approximately a day - circadian rhythms. Such rhythms persist even when the organism is placed under constant conditions, with ii period that is close, but not exactly equal, to 24 h, and are driven by an endogenous timer - one of the many 'biological clocks'. In plants, research into circadian rhythms has been driven forward by genetic experiments using Arabidopsis. Higher plant genomes include a particularly large number of genes involved in metabolism, and circadian rhythms may well provide the necessary coordination for the control of these - for example, around the diurnal rhythm of photosynthesis - to suit changing developmental or environmental conditions. The endogenous timer must be flexible enough to support these requirements. Current research supports this notion most strongly for the input pathway, in which multiple photoreceptors have been shown to mediate light input to the clock. Both input and output components are now related to putative circadian oscillator mechanisms by sequence homology or by experimental observation. It appears that the pathways linking some domains of the basic clock model may be very short indeed, or the mechanisms of these domains may overlap. Components of the first plant circadian output pathway to be identified unequivocally will help to determine exactly how many output pathways control the various phases of overt rhythms in plants.
引用
收藏
页码:175 / 197
页数:23
相关论文
共 176 条
[1]  
ACEVEDO A, 1991, GENETICS, V127, P601
[2]  
Agosti RD, 1997, ARCH SCI, V50, P233
[3]   A mutant Drosophila homolog of mammalian Clock disrupts circadian rhythms and transcription of period and timeless [J].
Allada, R ;
White, NE ;
So, WV ;
Hall, JC ;
Rosbash, M .
CELL, 1998, 93 (05) :791-804
[4]  
Anderson SL, 1997, PLANT CELL, V9, P1727, DOI 10.1105/tpc.9.10.1727
[5]   FUNCTIONAL DISSECTION OF CIRCADIAN CLOCK-REGULATED AND PHYTOCHROME-REGULATED TRANSCRIPTION OF THE ARABIDOPSIS CAB2 GENE [J].
ANDERSON, SL ;
KAY, SA .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1995, 92 (05) :1500-1504
[6]  
[Anonymous], 1998, NATURE, DOI DOI 10.1038/35140
[7]   Ancestral multipartite units in light-responsive plant promoters have structural features correlating with specific phototransduction pathways [J].
ArguelloAstorga, GR ;
HerreraEstrella, LR .
PLANT PHYSIOLOGY, 1996, 112 (03) :1151-1166
[8]   NEGATIVE FEEDBACK DEFINING A CIRCADIAN CLOCK - AUTOREGULATION OF THE CLOCK GENE-FREQUENCY [J].
ARONSON, BD ;
JOHNSON, KA ;
LOROS, JJ ;
DUNLAP, JC .
SCIENCE, 1994, 263 (5153) :1578-1584
[9]   LIGHT INDUCTION OF THE CLOCK-CONTROLLED GENE CCG-1 IS NOT TRANSDUCED THROUGH THE CIRCADIAN CLOCK IN NEUROSPORA-CRASSA [J].
ARPAIA, G ;
LOROS, JJ ;
DUNLAP, JC ;
MORELLI, G ;
MACINO, G .
MOLECULAR & GENERAL GENETICS, 1995, 247 (02) :157-163
[10]   SIGNAL-TRANSDUCTION IN GUARD-CELLS [J].
ASSMANN, SM .
ANNUAL REVIEW OF CELL BIOLOGY, 1993, 9 :345-375