Loading content, please wait..
loading..
Logo
Version 3.20
or
Authors Rejili, M; Vadel, AM; Guetet, A; Neffatti, M
Author Full Name Rejili, M.; Vadel, A. M.; Guetet, A.; Neffatti, M.
Title Effect of NaCl on the growth and the ionic balance K+/Na+ of two populations of Lotus creticus (L.) (Papilionaceae)
Source SOUTH AFRICAN JOURNAL OF BOTANY
Language English
Document Type Article
Author Keywords growth; Lotus creticus; osmotic adjustment; ratio K+/Na+; salinity; tolerance
Keywords Plus SALT TOLERANCE; SALINITY TOLERANCE; SORGHUM-BICOLOR; WATER-STRESS; BARLEY; PLANTS; PHYSIOLOGY; RESPONSES; SEEDLINGS; SODIUM
Abstract Lotus creticus (L.) is a major pastoral and forage legume in the and climate of Tunisia where salinity is a serious production problem. A laboratory experiment was carried out to assess the physiological behaviour of two populations of L. creticus (Msarref (Msf) and Oued Dkouk (Odk)) in a solid substratum in the presence of salt. The tested concentrations vary from 0 to 400 mM NaCl. It has been shown that the two populations of L. creticus are fairly tolerant to salt at growth phase. The growth productions are recorded in absence of salt, mainly at the population of Oued Dkouk. The presence of salt in the medium affects growth of the whole plant for both populations. Compared to root biomass, the aerial one was more affected by salt. For all treatments, plants of both populations remain able to produce and to allocate dry matter to the different organs. However, the salinity generated a disruption at the level of water feeding of plants of the two populations. Compared to root organ, water contents in aerial organ proved to be the least affected by salt. The survey of the relation of water content of leaves according to its production in biomass showed that the expression of growth potentialities is associated with a better leaves hydration until 100 mM of salinity. It seems then that the decrease of growth under saline stress is not associated to a water (osmotic) effect. The survey of the Na+/K+ ratio showed for both populations an increase of Na+ contents in aerial and root organs, with an excess of accumulation of these ions in the aerial organ particularly more marked at the population of Msarref. In spite of the predominance of the Na+ ions, the two populations, mainly Clued Dkouk, remain able to assure K+ selectivity. This selectivity is ensured mainly at the level of roots where high potassium content is recorded compared to the aerial organ. The tolerance of the two populations is probably acquired by their better faculty to assure K+ selectivity and to compartmentalize Na+ ions in leaves. Such a mechanism reflects probably an inclusive behaviour towards salt. This behaviour justifies the faculty of plants to maintain their growth even in very hard salinity conditions. (c) 2007 SAAB. Published by Elsevier B.V. All rights reserved.
Author Address [Rejili, M.] Arid Area Inst IRA, Arid & Oases Cropp Lab, Medenine 4119, Tunisia; [Vadel, A. M.] Fac Sci, Abiot Stress Lab, Gabes 6011, Tunisia; [Guetet, A.; Neffatti, M.] Arid Area Inst IRA, Lab Range Ecol, Medenine 4119, Tunisia
Reprint Address Rejili, M (reprint author), Arid Area Inst IRA, Arid & Oases Cropp Lab, Medenine 4119, Tunisia.
E-mail Address rejili_mokhtar@yahoo.fr
Times Cited 32
Total Times Cited Count (WoS, BCI, and CSCD) 34
Publisher ELSEVIER SCIENCE BV
Publisher City AMSTERDAM
Publisher Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN 0254-6299
29-Character Source Abbreviation S AFR J BOT
ISO Source Abbreviation S. Afr. J. Bot.
Publication Date NOV
Year Published 2007
Volume 73
Issue 4
Beginning Page 623
Ending Page 631
Digital Object Identifier (DOI) 10.1016/j.sajb.2007.06.006
Page Count 9
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 242JO
Unique Article Identifier WOS:000251721600017
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. 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. 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