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Sodium-related partial stomatal closure and salt tolerance of Aster tripolium

Kerstiens, Gerhard and Tych, W and Robinson, M F and Mansfield, T A (2002) Sodium-related partial stomatal closure and salt tolerance of Aster tripolium. New Phytologist, 153 (3). pp. 509-515. ISSN 0028-646X

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When Aster tripolium is grown at high salinity, stomatal closure is induced by the presence of sodium ions in the apoplast surrounding the guard cells. The occurrence of this system in Aster tripolium and not in the closely related glycophyte Aster amellus suggests that it could be an important factor in the network of physiological attributes required for salt tolerance. Gas exchange and growth parameters were measured in Aster tripolium plants grown at different levels of salinity. A simple mechanistic model was constructed to test whether the Na-sensing feature of the guard cells was a realistic component of salinity tolerance. The model captured very well the behaviour of plants in terms of salt uptake and reduction of growth with increasing salinity. There was moderate variance between measured and modelled rates of decrease of conductance with increasing levels of salinity. No evidence was found to refute our hypothesis that stomatal closure in response to sodium plays an important role in salt tolerance of Aster tripolium.

Item Type: Journal Article
Journal or Publication Title: New Phytologist
Uncontrolled Keywords: Aster tripolium L. (Tripolium vulgare) ; growth ; identifiability ; salt marsh ; salt tolerance ; sea aster ; stomatal conductance ; GUARD-CELLS ; GROWTH ; ACCUMULATION ; HALOPHYTES ; SALINITY
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 51285
Deposited By: ep_importer_pure
Deposited On: 17 Nov 2011 12:14
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2018 04:16
Identification Number:

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