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Descripción
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| Despite intensive research for more than 50 years, how Na+ enters the plant is still unknown. Previously we found out that under saline conditions Na+ entrance in Arabidopsis takes place largely in a nitrate-dependent manner (Álvarez-Aragón and Rodriguez-Navarro, 2017), suggesting that Na+ may enter the root through a nitrate transporter. A large family of at least 53 genes in Arabidopsis encodes nitrate transporters. Therefore, the identification of which transporters are involved in Na+ uptake may be a hard task. In this study we performed a transcriptomic analysis to identify transporters differentially expressed during Na+ root entry. Using Illumina RNA-Seq transcriptome profiling, we compared the expression of genes encoding putative transporters or channels in hydroponic-grown plants in control conditions (MES without Na+) or in two different saline conditions, nitrate independent Na-MES (MES with 20 mM Na+) or nitrate dependent NaNO3 (20 mM NO3 and 20 mM Na+). A total of 53 and 59 differentially expressed genes (DEGs) were identified under Na-MES and NaNO3 treatments compared to control with less than 20% overlap between both gene sets. Indeed, 42 DEGs encoding transporters were identified in a comparison between NaNO3 and Na-MES conditions. We hypothesized that the transporters responsible for nitrate-dependent Na+ entrance will be among this latter group and therefore we have selected some genes for further study. In addition, we also identified candidates for nitrate-independent Na+ uptake among DEGs from Na-MES vs control comparison. We are carrying out a phenotypic study of Na+ accumulation of the respective Arabidopsis defective mutants and a functional characterization in Na+ defective yeast mutants that should allow us to identify the transporters involved in the Na+ root entrance by plant roots. | |
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Internacional
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No |
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Nombre congreso
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XIV REUNIÓN DE BIOLOGÍA MOLECULAR DE PLANTAS |
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Tipo de participación
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970 |
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Lugar del congreso
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Salamanca |
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Revisores
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Si |
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ISBN o ISSN
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000-0-00-000000-0 |
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DOI
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Fecha inicio congreso
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04/07/2018 |
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Fecha fin congreso
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06/07/2018 |
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Desde la página
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180 |
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Hasta la página
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180 |
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Título de las actas
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Libro de abstracts de la XIV REUNIÓN DE BIOLOGÍA MOLECULAR DE PLANTAS |