Observatorio de I+D+i UPM

Memorias de investigación
Conferences:
Metallating the nodule: Transition metal transport in symbiotic nitrogen fixation
Year:2017
Research Areas
  • Microbiology
Information
Abstract
Symbiotic nitrogen fixation requires a relatively large amount of transition metals (iron, copper, zinc, molybdenum,?), as cofactors of some of the key enzymes involved in this process. For instance, nitrogenase uses iron and molybdenum to fix nitrogen in an microaerobic environment created by the iron-protein leghemoglobin, using the energy provided in an electron-transport chain involving iron-copper cytochrome oxidases. Consequently, symbiotic nitrogen fixation is severely influenced by the host plant ability to uptake these metallic oligonutrients from soil and deliver them to the endosymbiotic rhizobia within the nodule cells. Using synchrotron-based X-ray fluorescence, our group has mapped transition metal distribution in Medicago truncatula nodules to determine how these elements are delivered. This information has allowed us to identify a set of transporters mediating metal translocation into rhizobia-infected cells, and their delivery to symbiosomes. Expression levels of some of these transporters correlate with legume adaptation to soils with low iron availability.
International
Si
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Entity
Entity Nationality
Sin nacionalidad
Place
Participants
  • Autor: Manuel Gonzalez Guerrero (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: BIOLOGÍA MOLECULAR Y COMPUTACIONAL
  • Centro o Instituto I+D+i: Centro de Biotecnología y Genómica de Plantas, CBGP
  • Departamento: Biotecnología - Biología Vegetal
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)
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