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    Drought stress provokes the down-regulation of methionine and ethylene biosynthesis pathways in Medicago truncatula roots and nodules

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    MatCompl.zip (851.4Kb)
    Fecha
    2014
    Autor
    Larrainzar Rodríguez, Estíbaliz Upna
    Molenaar, Johanna A. 
    Wienkoop, Stefanie 
    Gil Quintana, Erena Upna
    Alibert, Bénédicte 
    Limami, Anis M. 
    Arrese-Igor Sánchez, César Upna
    González García, Esther Upna
    Versión
    Acceso abierto / Sarbide irekia
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    Artículo / Artikulua
    Versión
    Versión aceptada / Onetsi den bertsioa
    Identificador del proyecto
    EC/FP7/253141 openaire 
     
    ES/6PN/AGL2011–23738 
     
    ES/6PN/AGL2011–30386 
    Impacto
     
     
    10.1111/pce.12285
     
     
     
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    Resumen
    Symbiotic nitrogen fixation is one of the first physiological processes inhibited in legume plants under water-deficit conditions. Despite the progress made in the last decades, the molecular mechanisms behind this regulation are not fully understood yet. Recent proteomic work carried out in the model legume Medicago truncatula provided the first indications of a possible involvement of nod ... [++]
    Symbiotic nitrogen fixation is one of the first physiological processes inhibited in legume plants under water-deficit conditions. Despite the progress made in the last decades, the molecular mechanisms behind this regulation are not fully understood yet. Recent proteomic work carried out in the model legume Medicago truncatula provided the first indications of a possible involvement of nodule methionine (Met) biosynthesis and related pathways in response to waterdeficit conditions. To better understand this involvement, the drought-induced changes in expression and content of enzymes involved in the biosynthesis of Met, S-adenosyl-Lmethionine (SAM) and ethylene in M. truncatula root and nodules were analyzed using targeted approaches. Nitrogenfixing plants were subjected to a progressive water deficit and a subsequent recovery period. Besides the physiological characterization of the plants,the content of total sulphur,sulphate and main S-containing metabolites was measured. Results presented here show that S availability is not a limiting factor in the drought-induced decline of nitrogen fixation rates in M. truncatula plants and provide evidences for a downregulation of the Met and ethylene biosynthesis pathways in roots and nodules in response to water-deficit conditions. [--]
    Materias
    Symbiosis, Proteome, Sulfur metabolism.
     
    Editor
    Wiley
    Publicado en
    Plant, Cell and Environment 37: 2051-2063
    Notas
    Incluye 3 ficheros de datos
    Departamento
    Universidad Pública de Navarra. Departamento de Ciencias del Medio Natural / Nafarroako Unibertsitate Publikoa. Natura Ingurunearen Zientziak Saila
     
    Versión del editor
    https://dx.doi.org/10.1111/pce.12285
    URI
    https://hdl.handle.net/2454/24089
    Entidades Financiadoras
    This work was supported by the Spanish Ministry of Economy and Competitiveness (AGL 2011–23738 and AGL 2011–30386-C02-01).E.L. is a recipient of a Marie Curie International Outgoing Fellowship for Career Development (PIOF-GA-2009–253141). E.G-Q. received a PhD fellowship from the Public University of Navarre (735/2008).
    Aparece en las colecciones
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    • Artículos de revista - Aldizkari artikuluak [1029]
    • Investigaciones financiadas por la Unión Europea (OpenAire) - Europar Batasunak finantzatutako ikerketak (OpenAire) [26]
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