Salt Tolerance in the Halophyte Suaeda maritima L.Dum.: Abscisic Acid Concentrations in Response to Constant and Altered Salinity

Clipson, N J W, Lachno, D R and Flowers, T J (1988) Salt Tolerance in the Halophyte Suaeda maritima L.Dum.: Abscisic Acid Concentrations in Response to Constant and Altered Salinity. Journal of Experimental Botany, 39 (10). pp. 1381-1388. ISSN 0022-0957

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Abstract

Endogenous abscisic acid contents were measured by gas-liquid chromatography in shoots of Suaeda maritima growing both in the steady state over a range of salinities and over a time-course following an increase in the culture solution salinity of between approximately 100 and 400 mol m−3 NaCl. In steady-state plants, the ABA content was maximal in the absence of salt at 41 ng g−1 fr. wt., declining to a minimum at 200 mol m−3 NaCl of 24 ng g−1 fr. wt. Increase of culture solution salinity resulted in a marked increase in shoot ABA which was maximal after 6 h or 24 h in plants previously growing at 200 mol m−3 NaCl and in the absence of salt, respectively. Additionally, culture solution water potentials were lowered by 1.0 MPa (equivalent to raising the salt concentration by around 200 mol m−3); this resulted in a similar increase in endogenous ABA content to that brought about by an iso-osmotic salt increase. Results are discussed in relation to the possible role of ABA in halophyte salt tolerance mechanisms.

Item Type: Article
Additional Information: Times Cited: 9 Clipson, njw lachno, dr flowers, tj
Keywords: Suaeda, halophyte, abscisic acid, salt tolerance
Schools and Departments: School of Life Sciences > Evolution, Behaviour and Environment
Subjects: Q Science
Depositing User: Catrina Hey
Date Deposited: 23 May 2012 08:16
Last Modified: 30 Nov 2012 17:12
URI: http://srodev.sussex.ac.uk/id/eprint/39019
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