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 0960-7412Full text not available from this repository.
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.
|Journal or Publication Title:||Plant Journal|
|Subjects:||Q Science > QH Natural history > QH301 Biology|
|Departments:||Faculty of Science and Technology > Lancaster Environment Centre|
Faculty of Science and Technology > Engineering
|Deposited By:||Dr Martin R McAinsh|
|Deposited On:||20 May 2008 11:35|
|Last Modified:||17 Mar 2016 01:10|
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