Ng, Carl K.-Y. and Carr, Kathryn and McAinsh, Martin and Powell, Brian and Hetherington, Alistair M. (2001) Drought-induced guard cell signal transduction involves sphingosine-1-phosphate. Nature, 410 (6828). pp. 596-599. ISSN 0028-0836Full text not available from this repository.
Stomata form pores on leaf surfaces that regulate the uptake of CO2 for photosynthesis and the loss of water vapour during transpiration1. An increase in the cytosolic concentration of free calcium ions ([Ca2+]cyt) is a common intermediate in many of the pathways leading to either opening or closure of the stomatal pore2, 3. This observation has prompted investigations into how specificity is controlled in calcium-based signalling systems in plants. One possible explanation is that each stimulus generates a unique increase in [Ca2+]cyt, or 'calcium signature', that dictates the outcome of the final response4. It has been suggested that the key to generating a calcium signature, and hence to understanding how specificity is controlled, is the ability to access differentially the cellular machinery controlling calcium influx and release from internal stores2, 3, 4, 5 . Here we report that sphingosine-1-phosphate is a new calcium-mobilizing molecule in plants. We show that after drought treatment sphingosine-1-phosphate levels increase, and we present evidence that this molecule is involved in the signal-transduction pathway linking the perception of abscisic acid to reductions in guard cell turgor.
|Journal or Publication Title:||Nature|
|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 11:39|
|Last Modified:||14 Nov 2016 00:04|
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