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The control of specificity in guard cell signal transduction.

Hetherington, Alistair M. and Gray, J. E. and Leckie, C. and McAinsh, Martin R. and Ng, C. and Pical, C. and Priestly, A. J. and Staxén, I. and Webb, A. A. R. (1998) The control of specificity in guard cell signal transduction. Philosophical Transactions of the Royal Society of London Series B - Biological Sciences, 353 (1374). pp. 1489-1494. ISSN 0962-8436

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Abstract

Stomatal guard cells have proven to be an attractive system for dissecting the mechanisms of stimulus–response coupling in plants. In this review we focus on the intracellular signal transduction pathways by which extracellular signals bring about closure and opening of the stomatal pore. It is proposed that guard cell signal transduction pathways may be organized into functional arrays or signalling cassettes that contain elements common to a number of converging signalling pathways. The purpose of these signalling cassettes may be to funnel extracellular signals down onto the ion transporters that control the fluxes of ions that underlie stomatal movements. Evidence is emerging that specificity in guard cell signalling may be, in part, encoded in complex spatio–temporal patterns of increases in the concentration of cytosolic–free calcium ([Ca2+]cyt). It is suggested that oscillations in [Ca2+]cyt may generate calcium signatures that encode information concerning the stimulus type and strength. New evidence is presented that suggests that these calcium signatures may integrate information when many stimuli are present.

Item Type: Article
Journal or Publication Title: Philosophical Transactions of the Royal Society of London Series B - Biological Sciences
Uncontrolled Keywords: stomata ; calcium ; signalling cassette ; guard cell ; signal transduction ; abscisic acid
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 26848
Deposited By: Dr Martin R McAinsh
Deposited On: 31 Jul 2009 09:45
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:36
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/26848

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