Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Iron distribution through the developmental stages of Medicago truncatula nodules
Year:2013
Research Areas
  • Molecular, cellular and genetic biology
Information
Abstract
Paramount to symbiotic nitrogen fixation (SNF) is the synthesis of a number of metalloenzymes that use iron as a critical component of their catalytical core. Since this process is carried out by endosymbiotic rhizobia living in legume root nodules, the mechanisms involved in iron delivery to the rhizobia-containing cells are critical for SNF. In order to gain insight into iron transport to the nodule, we have used synchrotron-based X-ray fluorescence to determine the spatio-temporal distribution of this metal in nodules of the legume Medicago truncatula with hitherto unattained sensitivity and resolution. The data support a model in which iron is released from the vasculature into the apoplast of the infection/differentiation zone of the nodule (zone II). The infected cell subsequently takes up this apoplastic iron and delivers it to the symbiosome and the secretory system to synthesize ferroproteins. Upon senescence, iron is relocated to the vasculature to be reused by the shoot. These observations highlight the important role of yet to be discovered metal transporters in iron compartmentalization in the nodule and in the recovery of an essential and scarce nutrient for flowering and seed production.
International
Si
JCR
Si
Title
Metallomics
ISBN
1756-5901
Impact factor JCR
4,099
Impact info
Volume
5
Journal number
From page
1247
To page
1253
Month
SIN MES
Ranking
Participants
  • Autor: Benjamín Rodríguez-Haas (UPM)
  • Autor: Lydia Finney (Argonne National Laboratory)
  • Autor: Stefan Vogt (Argonne National Laboratory)
  • Autor: Pablo Gonzalez-Melendi De Leon (UPM)
  • Autor: Juan Imperial Ródenas (UPM)
  • Autor: Manuel Gonzalez Guerrero (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Asociaciones simbióticas planta-microorganismo
  • Centro o Instituto I+D+i: Centro de Biotecnología y Genómica de Plantas, CBGP
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)