Publication Date:
1995-09-29
Description:
Tobacco and Arabidopsis plants, expressing a transgene for the calcium-sensitive luminescent protein apoaequorin, revealed circadian oscillations in free cytosolic calcium that can be phase-shifted by light-dark signals. When apoaequorin was targeted to the chloroplast, circadian chloroplast calcium rhythms were likewise observed after transfer of the seedlings to constant darkness. Circadian oscillations in free calcium concentrations can be expected to control many calcium-dependent enzymes and processes accounting for circadian outputs. Regulation of calcium flux is therefore fundamental to the organization of circadian systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnson, C H -- Knight, M R -- Kondo, T -- Masson, P -- Sedbrook, J -- Haley, A -- Trewavas, A -- GM48053/GM/NIGMS NIH HHS/ -- MH01179/MH/NIMH NIH HHS/ -- MH43836/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1995 Sep 29;269(5232):1863-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Vanderbilt University, Nashville, TN 37235, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569925" target="_blank"〉PubMed〈/a〉
Keywords:
Aequorin/genetics/metabolism
;
Apoproteins/genetics/metabolism
;
Arabidopsis/genetics/*metabolism
;
Calcium/*metabolism
;
Calcium-Binding Proteins/genetics/metabolism
;
Chloroplasts/*metabolism
;
*Circadian Rhythm
;
Cytosol/*metabolism
;
Darkness
;
Light
;
Luminescence
;
Plants, Genetically Modified
;
*Plants, Toxic
;
Recombinant Proteins/genetics/metabolism
;
Tobacco/genetics/*metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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