Publication Date:
1998-11-20
Description:
Circadian clocks are synchronized by environmental cues such as light. Photoreceptor-deficient Arabidopsis thaliana mutants were used to measure the effect of light fluence rate on circadian period in plants. Phytochrome B is the primary high-intensity red light photoreceptor for circadian control, and phytochrome A acts under low-intensity red light. Cryptochrome 1 and phytochrome A both act to transmit low-fluence blue light to the clock. Cryptochrome 1 mediates high-intensity blue light signals for period length control. The presence of cryptochromes in both plants and animals suggests that circadian input pathways have been conserved throughout evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Somers, D E -- Devlin, P F -- Kay, S A -- GM56006/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1998 Nov 20;282(5393):1488-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and National Science Foundation Center for Biological Timing, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92307, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9822379" target="_blank"〉PubMed〈/a〉
Keywords:
Arabidopsis/genetics/*physiology
;
Arabidopsis Proteins
;
Biological Clocks/*physiology
;
Circadian Rhythm/*physiology
;
Cryptochromes
;
*Drosophila Proteins
;
*Eye Proteins
;
Flavoproteins/genetics/*physiology
;
Light
;
Mutation
;
*Photoreceptor Cells
;
*Photoreceptor Cells, Invertebrate
;
Phytochrome/genetics/*physiology
;
Phytochrome A
;
Phytochrome B
;
Plants, Genetically Modified
;
Receptors, G-Protein-Coupled
;
Signal Transduction
;
*Transcription Factors
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
