Loading content, please wait..
loading..
Logo
Version 3.21
or
Publication Type J
Authors Kachout, S. S., A. Ben Mansoura, K. J. Hamza, J. C. Leclerc, M. N. Rejeb and Z. Ouerghi
Title Leaf-water relations and ion concentrations of the halophyte Atriplex hortensis in response to salinity and water stress
Source Acta Physiologiae Plantarum
Abstract The impact of salinity and water stress was analyzed in the xero-halophyte Atriplex hortensis using two varieties: green orach (A. hortensis var. purpurea) and red orach (A. hortensis var. rubra). A. hortensis L. is a C(3) species well adapted to salt and drought conditions. To collect information on the physiological impact of different salt and water deficit levels on their water stress resistance, plants were exposed for 3 months to solution containing four levels of NaCl or to water stress regimes including four levels of field capacity. Osmotic potential at zero turgor I (s) (0) , osmotic potential at full turgor (I (s) (100) ), relative water content (RWC), ion concentration (Na(+), K(+), Ca(2+), Mg(2+), and Cl(-)), and malondialdehyde (MDA) were determined at the end of the treatment. The salinity and water stress induced a decrease in I (s) (100) , I (s) (0) , and RWC in both varieties, recorded changes being higher in plants of red variety than those of green variety. Both varieties specifically accumulated Na(+) in response to drought and salt stress, suggesting that this element could play a physiological role in the stress response of this xero-halophyte species. In contrast, the presence of NaCl and water stress induced a decrease in K(+), Ca(2+), and Mg(2+) concentration in both varieties. Salinity clearly induced an increase in Cl(-) concentration in all tissues, but water stress had no impact on this parameter. MDA concentration increased in response to water stress and exogenous NaCl. Based on these findings the more drought-tolerant red orach may be grown in water-limiting soils.
Author Address [Kachout, S. Sai; Hamza, K. Jaffel; Ouerghi, Z.] Fac Sci Tunis, Tunis 1060, Tunisia. [Ben Mansoura, A.; Rejeb, M. N.] Inst Natl Rech Genie Rural Eaux & Forets, Tunis 2080, Tunisia. [Leclerc, J. C.] Fac Sci & Tech St Etienne, Equipe Ecophysiol Appl, St Etienne, France. Kachout, SS (reprint author), Fac Sci Tunis, Campus Univ, Tunis 1060, Tunisia. salmasey@yahoo.fr
ISSN 0137-5881
ISBN 0137-5881
Publication Date Mar
Year Published 2011
Volume 33
Issue 2
Beginning Page 335-342
Digital Object Identifier (DOI) 10.1007/s11738-010-0552-4
Unique Article Identifier WOS:000287499300012
Plants associated with this reference

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This database is based on an earlier work by James Aronson.
THIS WEBSITE AND THIS DATABASE ARE PROVIDED ON AN "AS IS" BASIS, AND YOU USE THEM AND RELY ON THEM AT YOUR OWN RISK.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed