Is N-feedback involved in the inhibition of nitrogen fixation in drought-stressed Medicago truncatula?
| dc.contributor.author | Gil Quintana, Erena | |
| dc.contributor.author | Larrainzar Rodríguez, Estíbaliz | |
| dc.contributor.author | Arrese-Igor Sánchez, César | |
| dc.contributor.author | González García, Esther | |
| dc.contributor.department | Ciencias del Medio Natural | es_ES |
| dc.contributor.department | Natura Ingurunearen Zientziak | eu |
| dc.contributor.funder | Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa: 735/2008 | es |
| dc.date.accessioned | 2017-04-11T08:14:33Z | |
| dc.date.available | 2017-04-11T08:14:33Z | |
| dc.date.issued | 2013 | |
| dc.description.abstract | Drought 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.sponsorship | This 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.mimetype | application/pdf | en |
| dc.identifier.doi | 10.1093/jxb/ers334 | |
| dc.identifier.issn | 0022-0957 (Print) | |
| dc.identifier.issn | 1460-2431 (Electronic) | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/24090 | |
| dc.language.iso | eng | en |
| dc.publisher | Oxford University Press | en |
| dc.publisher | Society for Experimental Biology | en |
| dc.relation.ispartof | Journal of Experimental Botany Vol. 64, No. 1, pp. 281–292, 2013 | en |
| dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//AGL2011-23738/ES/ | |
| dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//AGL2011-30386-C02-01/ES/ | |
| dc.relation.projectID | info:eu-repo/grantAgreement/European Commission/FP7/253141/ | |
| dc.relation.publisherversion | https://dx.doi.org/10.1093/jxb/ers334 | |
| 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 cited | en |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc/2.0/uk/ | |
| dc.subject | Amino acids | en |
| dc.subject | Drought | en |
| dc.subject | Local regulation | en |
| dc.subject | Medicago truncatula | en |
| dc.subject | N-feedback inhibition | en |
| dc.subject | Nitrogen fixation | en |
| dc.subject | Transpiration | en |
| dc.title | Is N-feedback involved in the inhibition of nitrogen fixation in drought-stressed Medicago truncatula? | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | |
| dspace.entity.type | Publication | |
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