Iron distribution through the developmental stages of Medicago truncatula nodules.

Rodríguez-Haas, Benjamín and Finney, Lydia and Vogt, Stefan and Gonzalez-Melendi de Leon, Pablo and Imperial Ródenas, Juan and Gonzalez Guerrero, Manuel (2013). Iron distribution through the developmental stages of Medicago truncatula nodules.. "Metallomics" (n. 5); pp. 1247-1253. ISSN 1756-5901. https://doi.org/10.1039/C3MT00060E.

Description

Title: Iron distribution through the developmental stages of Medicago truncatula nodules.
Author/s:
  • Rodríguez-Haas, Benjamín
  • Finney, Lydia
  • Vogt, Stefan
  • Gonzalez-Melendi de Leon, Pablo
  • Imperial Ródenas, Juan
  • Gonzalez Guerrero, Manuel
Item Type: Article
Título de Revista/Publicación: Metallomics
Date: April 2013
ISSN: 1756-5901
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 26858
DC Identifier: http://oa.upm.es/26858/
OAI Identifier: oai:oa.upm.es:26858
DOI: 10.1039/C3MT00060E
Official URL: http://pubs.rsc.org/en/content/articlelanding/2013/mt/c3mt00060e#!divAbstract
Deposited by: Memoria Investigacion
Deposited on: 20 Jun 2014 16:54
Last Modified: 22 Sep 2014 11:43
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