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dc.creatorGil Quintana, Erenaes_ES
dc.creatorLarrainzar Rodríguez, Estíbalizes_ES
dc.creatorArrese-Igor Sánchez, Césares_ES
dc.creatorGonzález García, Estheres_ES
dc.date.accessioned2017-04-11T08:14:33Z
dc.date.available2017-04-11T08:14:33Z
dc.date.issued2013
dc.identifier.issn0022-0957 (Print)
dc.identifier.issn1460-2431 (Electronic)
dc.identifier.urihttps://hdl.handle.net/2454/24090
dc.description.abstractDrought stress is a major factor limiting nitrogen fixation (NF) in crop production. However, the regulatory mechanism involved and the origin of the inhibition, whether local or systemic, is still controversial and so far scarcely studied in temperate forage legumes. Medicago truncatula plants were symbiotically grown with a split-root system and exposed to gradual water deprivation. Physiological parameters, NF activity, and amino acid content were measured. The partial drought treatment inhibited NF in the nodules directly exposed to drought stress. Concomitantly, in the droughted below-ground organs, amino acids accumulated prior to any drop in evapotranspiration (ET). It is concluded that drought exerts a local inhibition of NF and drives an overall accumulation of amino acids in diverse plant organs which is independent of the decrease in ET. The general increase in the majority of single amino acids in the whole plant questions the commonly accepted concept of a single amino acid acting as an N-feedback signal.en
dc.description.sponsorshipThis work was financed by the Spanish Ministry of Economy and Competitiveness (AGL 2011–23738 and AGL 2011-30386-C02-01). EG-Q is a holder of a PhD fellowship from the Public University of Navarre (735/2008). EL is a recipient of a Marie Curie International Outgoing Fellowship for Career Development (PIOF-GA-2009–253141).en
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherOxford University Pressen
dc.publisherSociety for Experimental Biologyen
dc.relation.ispartofJournal of Experimental Botany Vol. 64, No. 1, pp. 281–292, 2013en
dc.rights© 2012 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly citeden
dc.rights.urihttp://creativecommons.org/licenses/ by-nc/2.0/uk/
dc.subjectAmino acidsen
dc.subjectDroughten
dc.subjectLocal regulationen
dc.subjectMedicago truncatulaen
dc.subjectN-feedback inhibitionen
dc.subjectNitrogen fixationen
dc.subjectTranspirationen
dc.titleIs N-feedback involved in the inhibition of nitrogen fixation in drought-stressed Medicago truncatula?en
dc.typeArtículo / Artikuluaes
dc.typeinfo:eu-repo/semantics/articleen
dc.contributor.departmentUniversidad Pública de Navarra. Departamento de Ciencias del Medio Naturales_ES
dc.contributor.departmentNafarroako Unibertsitate Publikoa. Natura Ingurunearen Zientziak Sailaeu
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.identifier.doi10.1093/jxb/ers334
dc.relation.projectIDinfo:eu-repo/grantAgreement/ES/6PN/AGL2011–23738en
dc.relation.projectIDinfo:eu-repo/grantAgreement/ES/6PN/AGL2011-30386en
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/253141en
dc.relation.publisherversionhttps://dx.doi.org/10.1093/jxb/ers334
dc.type.versionVersión publicada / Argitaratu den bertsioaes
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dc.contributor.funderUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoa: 735/2008es


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© 2012 The Author(s).
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited
Except where otherwise noted, this item's license is described as © 2012 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited