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Reference Detail
| Reference | ||
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| Author | El Mahi H., Pérez-Hormaeche J., De Luca A., Villalta I., Espartero J., Gámez-Arjona F., Fernández JL., Bundó M., Mendoza I., Mieulet D., Lalanne E., Lee S.Y., Yun D.J., Guiderdoni E., Aguilar M., Leidi E.O., Pardo J.M., Quintero F.J. | |
| Title | A Critical Role of Sodium Flux via the plasma membrane Na+/H+ exchanger SOS1 in the salt tolerance of Rice. | |
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Abstract: Rice (<i>Oryza sativa</i>) stands among the world's most important crop species. Rice is salt sensitive, and the undue accumulation of sodium ions (Na+) in shoots has the strongest negative correlation with rice productivity under long-term salinity. The plasma membrane Na+/H+ exchanger protein Salt Overly Sensitive 1 (SOS1) is the sole Na+ efflux transporter that has been genetically characterized to date. Here, the importance of SOS1-facilitated Na+ flux in the salt tolerance of rice was analyzed in a reverse-genetics approach. A <i>SOS1</i> loss-of-function mutant displayed exceptional salt sensitivity that was correlated with excessive Na+ intake and impaired Na+ loading into the xylem, thus indicating that SOS1 controls net root Na+ uptake and long-distance Na+ transport to shoots. The acute Na+ sensitivity of <i>SOS1</i> plants at low NaCl concentrations allowed analysis of the transcriptional response to sodicity stress without effects of the osmotic stress intrinsic to high-salinity treatments. In contrast with that in the wild type, <i>SOS1</i> mutant roots displayed preferential down-regulation of stress-related genes in response to salt treatment, despite the greater intensity of stress experienced by the mutant. These results suggest there is impaired stress detection or an inability to mount a comprehensive response to salinity in <i>SOS1</i> In summary, the plasma membrane Na+/H+ exchanger SOS1 plays a major role in the salt tolerance of rice by controlling Na+ homeostasis and possibly contributing to the sensing of sodicity stress. |
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| Journal | Plant Physiol. | |
| Country | Spain | |
| Volume | 180(2) | |
| Pages | 1046-1065 | |
| Year | 2019 | |
| PubMed ID | 30992336 | |
| PubMed Central ID | 6548274 | |
| DOI | 10.1104/pp.19.00324 | |
| URL | - | |
| Relation | ||
| Gene | SOS1 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
