Webb, Alex A. R. and McAinsh, Martin R. and Mansfield, Terry A. and Hetherington, Alistair M. (1996) Carbon dioxide induces increases in guard cell cytosolic free calcium. The Plant Journal, 9 (3). pp. 297-304.
Full text not available from this repository.Abstract
The hypothesis that increases in cytosolic free calcium ([Ca2+]i) are a component of the CO2 signal transduction pathway in stomatal guard cells of Commelina communis has been investigated. This hypothesis was tested using fura-2 fluorescence ratio photometry to measure changes in guard cell [Ca2+]i in response to challenge with 700 µl l−1 CO2. Elevated CO2 induced increases in guard cell [Ca2+]i which were similar to those previously reported in response to abscisic acid. [Ca2+]i returned to resting values following removal of the CO2 and further application of CO2 resulted in a second increase in [Ca2+]i. This demonstrated that the CO2-induced increases in [Ca2+]i were stimulus dependent. Removal of extracellular calcium both prevented the CO2-induced increase in [Ca2+]i and inhibited the associated reduction in stomatal aperture. These data suggest that Ca2+ acts as a second messenger in the CO2 signal transduction pathway and that an increase in [Ca2+]i may be a requirement for the stomatal response to CO2.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | The Plant Journal |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Departments: | Faculty of Science and Technology > Lancaster Environment Centre Faculty of Science and Technology > Engineering |
| ID Code: | 22191 |
| Deposited By: | ep_ss_importer |
| Deposited On: | 12 Feb 2009 14:34 |
| Refereed?: | No |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 15:57 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/22191 |
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