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AOBPreview originally published online on August 21, 2003
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Annals of Botany 92: 477-485, 2003
© 2003 Annals of Botany Company

Encoding Specificity in Plant Calcium Signalling: Hot-spotting the Ups and Downs and Waves

CARL K.-Y. NG1 and MARTIN R. MCAINSH*,2

1 Department of Botany, University College Dublin, Belfield, Dublin 4, Republic of Ireland and 2 Department of Biological Sciences, Institute of Environmental and Natural Sciences, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK

* For correspondence. Fax +44 1524 843854, e-mail m.mcainsh{at}lancaster.ac.uk

Received: 8 May 2003; Returned for revision: 2 June 2003; Accepted: 15 June 2003    Published electronically: 21 August 2003

Calcium ions function as intracellular second messengers in regulating a plethora of cellular processes from acclimative stress responses to survival and programmed cell death. The generation of specificity in Ca2+ signals is dependent on influx and efflux from the extracellular milieu, cytosol and intracellular organelles. One aspect of plant Ca2+ signalling that is currently attracting a great deal of interest is how ‘Ca2+-signatures’, specific spatio-temporal changes in cytosolic-free Ca2+, encode the necessary information to bring about this range of physiological responses. Here, current information is reviewed on how Ca2+-signatures are generated in plant cells and how stimulus-specific information can be encoded in the form of Ca2+-signatures.

Key words: Calcium, waves, oscillations, hot-spots, cytosolic free calcium ([Ca2+]cyt), guard cells, ion channels


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