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

journal contribution
posted on 2023-06-08, 11:30 authored by N J W Clipson, D R Lachno, Tim Flowers
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.

History

Publication status

  • Published

Journal

Journal of Experimental Botany

ISSN

0022-0957

Publisher

Oxford University Press

Issue

10

Volume

39

Page range

1381-1388

Department affiliated with

  • Evolution, Behaviour and Environment Publications

Notes

Times Cited: 9 Clipson, njw lachno, dr flowers, tj

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-05-23

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