Ionic relations and osmotic adjustment in durum and bread wheat under saline conditions

Functional Plant Biology : FPB
Tracey Ann CuinSergey Shabala

Abstract

Wheat breeding for salinity tolerance has traditionally focussed on Na+ exclusion from the shoot, but its association with salinity tolerance remains tenuous. Accordingly, the physiological significance of shoot Na+ exclusion and maintenance of an optimal K+ : Na+ ratio was re-evaluated by studying NaCl-induced responses in 50 genotypes of bread wheat (Triticum aestivum L.) and durum wheat (Triticum turgidum L. ssp. durum) treated with 150 mM NaCl. Overall, Na+ exclusion from the shoot correlated with salinity tolerance in both species and this exclusion was more efficient in bread compared with durum wheat. Interestingly, shoot sap K+ increased significantly in nearly all durum and bread wheat genotypes. Conversely, the total shoot K+ content declined. We argue that this increase in shoot sap K+ is needed to provide efficient osmotic adjustment under saline conditions. Durum wheat was able to completely adjust shoot sap osmolality using K+, Na+ and Cl-; it had intrinsically higher levels of these solutes. In bread wheat, organic osmolytes must contribute ~13% of the total shoot osmolality. In contrast to barley (Hordeum vulgare L.), NaCl-induced K+ efflux from seedling roots did not predict salinity tolerance in wheat, implyin...Continue Reading

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Citations

Aug 25, 2010·Journal of Experimental Botany·Yuda HariadiSergey Shabala
Nov 21, 2015·Journal of Experimental Botany·Min ZhuSergey Shabala
Apr 4, 2017·The Plant Journal : for Cell and Molecular Biology·Rocío Álvarez-Aragón, Alonso Rodríguez-Navarro
Mar 15, 2018·Frontiers in Plant Science·Youssef RouphaelStefania De Pascale
Nov 7, 2019·Frontiers in Plant Science·Yusuf GencTim Sutton
May 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Kehao ZhangJian Zeng
Nov 1, 2017·Functional Plant Biology : FPB·Joanne TilbrookStuart J Roy
Jan 26, 2017·Frontiers in Plant Science·Maria Grazia AnnunziataPetronia Carillo
May 31, 2017·Plant, Cell & Environment·Ali Kiani-PouyaSergey Shabala
Feb 20, 2018·Frontiers in Plant Science·Petronia Carillo
Aug 1, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Muhammad A AsifAllison S Pearson
Mar 23, 2019·Frontiers in Plant Science·Maria Grazia AnnunziataPetronia Carillo
Jul 1, 2016·Functional Plant Biology : FPB·Aizheng YangSven-Erik Jacobsen
Nov 27, 2014·Frontiers in Plant Science·Karthika KrishnasamyQifu Ma
Nov 27, 2015·The New Phytologist·Yusuf GencGraham H Lyons
May 31, 2019·The Plant Journal : for Cell and Molecular Biology·Honghong WuSergey Shabala
Mar 25, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Fahad ShafiqMuhammad Ali
Nov 7, 2019·Plant & Cell Physiology·Mahvash ZareiLana Shabala
Dec 10, 2020·Plant Physiology and Biochemistry : PPB·Adnan Noor ShahYouhong Song
May 11, 2021·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Noreen AkhterAli Noman

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