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Publication Type J
Authors Bajji, M., J. M. Kinet and S. Lutts
Title Osmotic and ionic effects of NaCl on germination, early seedling growth, and ion content of Atriplex halimus (Chenopodiaceae)
Source Canadian Journal of Botany-Revue Canadienne De Botanique
Author Keywords Atriplex halimus halophyte osmotic stress recovery of seed germination salinity salt stress salinity halophyte temperature accumulation responses cultures stocksii plants sativa
Abstract The effects of salt and osmotic stresses on the germination processes in seeds of the perennial halophyte species Atriplex halimus L. were compared using iso-osmotic concentrations of NaCl and mannitol. The lowest stress intensity delayed germination, while higher doses of NaCl and mannitol reduced final germination percentages. No significant difference occurred between the effects of these solutes on germination percentages or seedling dry weights. At an external osmotic potential of -0.7 MPa, however, the water content of mannitol-treated seedlings was reduced compared to that of seedlings that developed from NaCl-exposed seeds. The K, Mg, and Pi content decreased in seedlings that developed from mannitol-treated seeds while calcium concentration was strongly reduced in those arising from NaCl-treated seeds. Inhibited seeds were able to germinate at levels similar to those of the control after rinsing in deionized water and imbibition in control conditions. Seedlings produced from NaCl pre-treated seeds had a lower Ca and a higher Na content than control seedlings. The effect of salinity on the germination phase of development is mainly due to its osmotic component, and inhibition of germination is reversible. Both salt and osmotic stresses may have an impact on the mobilization of minerals from the seeds to the young seedling, but this effect does not have any consequence on growth processes analysed on a short-term basis.
Author Address Univ Catholique Louvain, Unite Bot Gen, Lab Cytogenet, B-1348 Louvain, Belgium. Lutts, S (reprint author), Univ Catholique Louvain, Unite Bot Gen, Lab Cytogenet, Pl Croix du Sud 5,Bte 13, B-1348 Louvain, Belgium.
ISSN 0008-4026
ISBN 0008-4026
29-Character Source Abbreviation Can. J. Bot.-Rev. Can. Bot.
Publication Date Mar
Year Published 2002
Volume 80
Issue 3
Beginning Page 297-304
Digital Object Identifier (DOI) 10.1139/b02-008
Unique Article Identifier WOS:000174560100008
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