Dissection of the ozone-induced calcium signature.

Clayton, Helen and Knight, Marc R. and Knight, Heather and McAinsh, Martin and Hetherington, Alistair M. (1999) Dissection of the ozone-induced calcium signature. Plant Journal, 17 (5). pp. 575-579. ISSN 0960-7412

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The cellular responses of plants to numerous extracellular stimuli are mediated by transient elevations in the concentration of cytosolic free calcium ([Ca2+]cyt). We have addressed the question of how cells can use this apparently ubiquitous system to initiate so many specific and appropriate end responses. We show that the pollutant gas ozone elicits a biphasic Ca2+ response in intact Arabidopsis plants and a subsequent increase in expression of the gene encoding the antioxidant defence enzyme glutathione-S-transferase (GST). The second of the two [Ca2+]cyt peaks, but not the first, could be eliminated either by pre-treatment of plants with lanthanum chloride, or by reducing the duration of ozone fumigation. Under these conditions, ozone-inducedGSTexpression was abolished. These data provide a functional dissection of the ozone Ca2+ signalling pathway and indicate that the second ozone-induced [Ca2+]cyt peak provides the necessary information to direct expression of GST.

Item Type: Journal Article
Journal or Publication Title: Plant Journal
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qh301
Departments: Faculty of Science and Technology > Lancaster Environment Centre
Faculty of Science and Technology > Engineering
ID Code: 8980
Deposited By: Dr Martin R McAinsh
Deposited On: 20 May 2008 10:35
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2020 02:56
URI: https://eprints.lancs.ac.uk/id/eprint/8980

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