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Publication Type J
Authors Nada, R. M. and G. M. Abogadallah
Title Developmental acquisition of salt tolerance in the halophyte Atriplex halimus L. is related to differential regulation of salt inducible genes
Source Plant Growth Regulation
Author Keywords Atriplex halimus Germination Seedling emergence Vegetative Osmotic Ionic water-use efficiency seed-germination suaeda-maritima quaternary ammonium signal-transduction salinity tolerance low-temperature stress arabidopsis growth
Abstract The present study investigated the developmental tolerance of Atriplex halimus to osmotic and/or ionic stress. A. halimus was exposed to NaCl (0, 100, 250 and 400 mM), KCl (0, 100, 250 and 400 mM) and sorbitol (0, 200, 500 and 800 mM) at the level of germination, seedling emergence and vegetative stages. The response of A. halimus to different salts was stage dependent especially to NaCl that had a remarkable effect on A. halimus growth at each stage. At the germination stage, the growth reduction could be attributed to osmotic effect and HRD may have a role in that osmotic sensitivity. At this stage, the accumulation of Na+ into vacuole could be a strategy for alleviating the osmotic effect. At the seedling emergence stage, the inhibition of growth could be mainly attributed to the ionic effect that may have resulted from excessive accumulation of Na+ along with inconsistent regulations of Na+ manipulating genes. A. halimus at the vegetative stage was an obligate halophyte with regulated mechanisms of tolerance to both ionic and osmotic components of salt stress. A. halimus exhibits glycophytic features at the early growth stages but it is an obligate halophyte at the vegetative stage.
Author Address [Nada, Reham M.; Abogadallah, Gaber M.] Damietta Univ, Dept Bot, Fac Sci, New Damietta 34517, Egypt. Nada, RM (reprint author), Damietta Univ, Dept Bot, Fac Sci, New Damietta 34517, Egypt. rnada@du.edu.eg
ISSN 0167-6903
ISBN 0167-6903
29-Character Source Abbreviation Plant Growth Regul.
Publication Date Jan
Year Published 2015
Volume 75
Issue 1
Beginning Page 165-178
Digital Object Identifier (DOI) 10.1007/s10725-014-9941-9
Unique Article Identifier WOS:000349974200016
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