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In SYNC: the ins and outs of circadian oscillations in calcium

TitleIn SYNC: the ins and outs of circadian oscillations in calcium
Publication TypeJournal Article
Year of Publication2007
AuthorsImaizumi T, Schroeder JI, Kay SA
JournalSci STKE
Date Published2007
ISBN Number1525-8882 (Electronic)1525-8882 (Linking)
Keywords*Models, Biological, *Plant Physiological Phenomena, Animals, Calcium/*metabolism/physiology, Circadian Rhythm/*physiology, Flowers/metabolism, Mammals/*physiology, Photoperiod, Receptors, Calcium-Sensing/metabolism, Second Messenger Systems/*physiology, Suprachiasmatic Nucleus/metabolism

<p>Many stimuli induce short-term increases in the cytosolic concentration of free calcium ions ([Ca(2+)](i)) that encode signaling information about diverse physiological and developmental events. Slow cytosolic Ca(2+) oscillations that span an entire day have also been discovered in both plants and animals; it is thought that these daily Ca(2+) oscillations may encode circadian clock signaling information. A recent study focusing on the characterization of the extracellular Ca(2+)-sensing receptor (CAS) has provided insight into the molecular mechanisms by which the daily Ca(2+) oscillation in plants is generated. We summarize the major findings regarding daily oscillations of cytosolic Ca(2+) concentrations in plants and animals, and discuss hypothetical biological roles for the circadian clock-regulated physiology in plants.</p>