Webb, Alex A. R. and Larman, Mark G. and Montgomery, Lucy T. and Taylor, Jane E. and Hetherington, Alistair M. (2001) The role of calcium in ABA-induced gene expression and stomatal movements. Plant Journal, 26 (3). pp. 351-362. ISSN 0960-7412
Full text not available from this repository.Abstract
There is much interest in the transduction pathways by which abscisic acid (ABA) regulates stomatal movements (ABA-turgor signalling) and by which this phytohormone regulates the pattern of gene expression in plant cells (ABA-nuclear signalling). A number of second messengers have been identified in both the ABA-turgor and ABA-nuclear signalling pathways. A major challenge is to understand the architecture of ABA-signalling pathways and to determine how the ABA signal is coupled to the appropriate response. We have investigated whether separate Ca2+-dependent and -independent ABA-signalling pathways are present in guard cells. Our data suggest that increases in [Ca2+]i are a common component of the guard cell ABA-turgor and ABA-nuclear signalling pathways. The effects of Ca2+ antagonists on ABA-induced stomatal closure and the ABA-responsive CDeT6-19 gene promoter suggest that Ca2+ is involved in both ABA-turgor signalling and ABA-nuclear signalling in guard cells. However, the sensitivity of these pathways to alterations in the external calcium concentration differ, suggesting that the ABA-nuclear and ABA-turgor signalling pathways are not completely convergent. Our data suggest that whilst Ca2+-independent signalling elements are present in the guard cell, they do not form a completely separate Ca2+-independent ABA-signalling pathway.
| Item Type: | Article |
|---|---|
| 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 |
| ID Code: | 9422 |
| Deposited By: | Dr Jane E Taylor |
| Deposited On: | 09 Jun 2008 13:14 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 18:36 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/9422 |
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