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Título: | The Na+/H+ exchanger SOS1 controls extrusion and distribution of Na+ in tomato plants under salinity conditions |
Autor: | Olías, Raquel CSIC ORCID ; Eljakaoui, Zakia; Pardo, José M. CSIC ORCID ; Belver, Andrés CSIC ORCID | Palabras clave: | Long-distance Na+ and K+ transport Plasma membrane Na+/H+ antiporter Salt tolerance Posttranscriptional gene silencing SlSOS1 Solanum lycopersicum (tomato) |
Fecha de publicación: | oct-2009 | Editor: | Landes Bioscience | Citación: | Plant Signaling and Behavior 4(10): 973-976 (2009) | Resumen: | Maintaining a high K+/Na+ ratio in the cell cytosol, along with the transport processes implicated in the xylem and phloem loading/unloading of Na+ in plants (long-distance transport) are key aspects in plant salt tolerance. The Ca2+-dependent SOS pathway regulating Na+ and K+ homeostasis and long-distance Na+ transport has been reported in Arabidopsis. However, Arabidopsis might not be the best model to analyze the involvement of the SOS pathway in long-distance Na+ trans- port due to the very short stem of these plants which do not allow a precise dissection of the relative content of Na+ in stem versus leaf. This separation would be critical to assess the role of SOS1 in xylem loading/unloading, Na+ export by roots, retention in stems and the differential distribution/accumulation in old leaves. Towards this goal, tomato might represent a superior model due to its anatomical structure and agricultural significance. We recently demonstrated the key role played by the plasma membrane Na+/H+ antiporter SlSOS1 in salt tolerance in tomato by maintaining ion homeostasis under salinity stress and in the partitioning of Na+ in plant organs. | Descripción: | 4 pages, 2 figures, 18 references. | Versión del editor: | http://dx.doi.org/10.1111/j.1365-3040.2009.01971.x. | URI: | http://hdl.handle.net/10261/55866 | DOI: | 10.1111/j.1365-3040.2009.01971.x. | ISSN: | 1559-2316 | E-ISSN: | 1559-2324 |
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The Na+:H+ exchanger SOS1 controls extrusion.pdf | 300,66 kB | Adobe PDF | Visualizar/Abrir |
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