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Publication Type J
Authors Islam, S., A. I. Malik, A. Islam and T. D. Colmer
Title Salt tolerance in a Hordeum marinum-Triticum aestivum amphiploid, and its parents
Source Journal of Experimental Botany
Author Keywords glycinebetaine; halophyte; ion 'exclusion'; leaf Cl-; leaf K+; leaf Na+; proline; salinity tolerance; sap osmotic potential; sea barleygrass; Triticeae; wheat; wide hybridization; wild relative disomic addition lines; thinopyrum-bessarabicum; physiological-responses; waterlogging tolerance; lophopyrum-elongatum; solute accumulation; agropyron-junceum; ionic relations; leaf blades; 2 wheat
Abstract Growth, grain production, and physiological traits were evaluated for Hordeum marinum, Triticum aestivum (cv. Chinese Spring), and a H. marinum-T. aestivum amphiploid, when exposed to NaCl treatments in a nutrient solution. H. marinum was more salt tolerant than T. aestivum and the amphiploid was intermediate, both for vegetative growth and relative grain production. H. marinum, was best able to 'exclude' Na+ and Cl-, particularly at high external NaCl. At 300 mM NaCl, concentrations of Na+ (153 mu mol g(-1) dry mass) and Cl- (75 mu mol g(-1) dry mass) in the youngest fully-expanded leaf blade of H. marinum were, respectively, only 7% and 4% of those in T. aestivum; and in the amphiplolid the Na+ and Cl- concentrations were 39% and 36% of those in T. aestivum. Glycinebetaine and proline concentrations in the youngest fully-expanded leaf blade of plants exposed to 200 mM NaCl were highest in H. marinum, (128 and 60 mu mol g-1 dry mass, respectively), lowest in T. aestivum, (85 and 37 mu mol g(-1) dry mass), and intermediate in the amphiploid (108 and 54 mu mol g(-1) dry mass). Thus, salt tolerance of H. marinum was expressed in the H. marinum-T. aestivum amphiploid.
Author Address Univ Western Australia, Sch Plant Biol, Crawley, WA 6009, Australia. Univ Western Australia, CRC Plant Based Management Dryland Salin, Crawley, WA 6009, Australia. Univ Adelaide, Sch Agr & Wine, Glen Osmond, SA 5064, Australia. Colmer, TD, Univ Western Australia, Sch Plant Biol, 35 Stirling Highway, Crawley, WA 6009, Australia. tdcolmer@cyllene.uwa.edu.au
29-Character Source Abbreviation J. Exp. Bot.
Year Published 2007
Volume 58
Issue 5
Beginning Page 1219-1229
Unique Article Identifier ISI:000246208900031
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