Effect of calcium on root development and root ion fluxes in salinised barley seedlings

Functional Plant Biology : FPB
Sergey ShabalaElizabeth Van Volkenburgh

Abstract

The effects of various Na / Ca ratios on root growth, development, and ion acquisition patterns were studied in hydroponic experiments with barley (Hordeum vulgare L.) plants. In total, interactions between three different levels of salinity (1, 50 and 100 mM NaCl) and three different levels of Ca2+ (0.1, 1 and 10 mM) were studied (a full factorial experiment). Growth rate and biomass accumulation were significantly lower in salinised roots. In addition to reduction in extension growth, salinity also significantly affected plant developmental processes (for example reduced root hair density and root thickening). Supplemental Ca2+ significantly ameliorated those detrimental effects of salinity. Non-invasive, microelectrode ion-flux (MIFE) measurements showed that the onset of salt stress caused rapid and prolonged efflux of H+, K+ and NH4+ from the root epidermis. This efflux could be significantly reversed, or completely prevented, by the presence of high Ca2+ concentration in the bath solution, even after several days of salt stress. Membrane potential measurements in root epidermal cells showed that high Ca2+ levels in the bath were able to restore (otherwise depolarised) membrane potential back to control level (-120 to -130...Continue Reading

Citations

Oct 23, 2013·Bulletin of Environmental Contamination and Toxicology·Hajaji Afef NasraouiHaouari Chiraz Chaffei
Apr 1, 2005·Functional Plant Biology : FPB·Beatriz G Neves-Piestun, Nirit Bernstein
Sep 1, 2008·Functional Plant Biology : FPB·Christiane F SmethurstSergey Shabala
Aug 30, 2008·Physiologia Plantarum·Sergey Shabala, Tracey A Cuin
Dec 18, 2009·The Plant Journal : for Cell and Molecular Biology·Sergey ShabalaLars H Wegner
Jul 26, 2006·Plant Biology·M C del Martínez-BallestaM Carvajal
Apr 20, 2010·Plant Biology·S Chen, A Polle
Mar 10, 2016·Journal of Experimental Botany·Arif Hasan Khan RobinKhandaker Nafiz Bayazid
Jan 22, 2015·Plant & Cell Physiology·Seong H Lee, Janusz J Zwiazek
Mar 1, 2007·Functional Plant Biology : FPB·Zhonghua ChenSergey Shabala
Jan 1, 2010·Functional Plant Biology : FPB·Tracey Ann CuinSergey Shabala
Apr 6, 2005·Journal of Experimental Botany·Sergey ShabalaIan Newman
Apr 5, 2013·Plant, Cell & Environment·Raúl HuertasMaría Pilar Rodríguez-Rosales
Aug 5, 2016·PloS One·Mohamad Al HassanOscar Vicente
Apr 21, 2019·The New Phytologist·Rana MunnsStephen D Tyerman
May 23, 2008·Journal of Experimental Botany·Tracey Ann CuinSergey Shabala
May 1, 2013·Journal of Experimental Botany·Shanjun TianRuilian Jing
Oct 1, 2011·Biomolecular Concepts·Sergey Shabala, Lana Shabala
Apr 16, 2019·Frontiers in Plant Science·Siddique I Aboobucker, Walter P Suza

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