title: NO3-, PO43-and SO42-deprivation reduced LKT1-mediated low-affinity K+uptake and SKOR-mediated K+translocation in tomato and Arabidopsis plants.
abstract: Regulation of essential macronutrients acquisition by plants in response to their availability is a key process for plant adaptation to changing environments. Here we show in tomato and Arabidopsis plants that when they are subjected to NO3-, PO43-and SO42-deprivation, low-affinity K+uptake and K+translocation to the shoot are reduced. In parallel, these nutritional deficiencies produce reductions in the messenger levels of the genes encoding the main systems for low-affinity K+uptake and K+translocation, i.e. AKT1 and SKOR in Arabidopsis and LKT1 and the tomato homolog of SKOR, SlSKOR in tomato, respectively. The results suggest that the shortage of one nutrient produces a general downregulation of the acquisition of other nutrients. In the case of K+nutrient, one of the mechanisms for such a response resides in the transcriptional repression of the genes encoding the systems for K+uptake and translocation.
authors.affiliation: Departamento de Nutrición Vegetal, CEBAS-CSIC, Murcia, 30100, Spain.
authors.forename: Reyes
authors.initials: R
authors.lastname: Ródenas
authors.affiliation: Departamento de Agroquímica y Medioambiente, Universidad Miguel Hernández, Alicante, 03312, Spain.
authors.forename: Manuel Francisco
authors.initials: MF
authors.lastname: García-Legaz
authors.affiliation: Departamento de Agroquímica y Medioambiente, Universidad Miguel Hernández, Alicante, 03312, Spain.
authors.forename: Elvira
authors.initials: E
authors.lastname: López-Gómez
authors.affiliation: Departamento de Nutrición Vegetal, CEBAS-CSIC, Murcia, 30100, Spain.
authors.forename: Vicente
authors.initials: V
authors.lastname: Martínez
authors.affiliation: Departamento de Nutrición Vegetal, CEBAS-CSIC, Murcia, 30100, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Rubio
authors.affiliation: Departamento de Biología Aplicada, Universidad Miguel Hernández, Alicante, 03312, Spain.
authors.forename: M
authors.identifier: http://orcid.org/0000-0003-4624-2307
authors.initials: M
authors.lastname: Ángeles Botella
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000378:metabolism*; D001692:Biological Transport; D018506:Gene Expression Regulation, Plant; D018551:Solanum lycopersicum / Q000235:genetics / Q000502:physiology*; D009566:Nitrates / Q000378:metabolism; D010710:Phosphates / Q000378:metabolism; D018520:Plant Shoots; D011188:Potassium / Q000378:metabolism*; D015221:Potassium Channels / Q000378:metabolism*; D051637:Shaker Superfamily of Potassium Channels / Q000378:metabolism*; D013431:Sulfates / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; C501895:LKT1 protein, Arabidopsis; D009566:Nitrates; D010710:Phosphates; D015221:Potassium Channels; C114544:SKOR protein, Arabidopsis; D051637:Shaker Superfamily of Potassium Channels; D013431:Sulfates; C074500:AKT1 protein, Arabidopsis; D011188:Potassium