Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
MEDICAGO TRUNCATULA COPPER TRANSPORTER 1 (MTCOPT1) PROVIDES COPPER FOR SYMBIOTIC NITROGEN FIXATION
Year:2017
Research Areas
  • Molecular, cellular and genetic biology,
  • Microbiology
Information
Abstract
Copper is an essential nutrient for symbiotic nitrogen fixation. This element is delivered by the host plant to the nodule, where membrane copper transporter would introduce it into the cell to synthesize cuproproteins. COPTfamilymembersare likely candidates to mediate copper uptake by rhizobia-infected cells. Medicago truncatula genome encodes eight COPT transporters. MtCOPT1 (Medtr4g019870) is the only nodule-specific COPT gene. Promoter:gus fusions and protein immunolocalization studies indicate that MtCOPT1 is located in the plasma membrane of cells in the differentiation, interzone and early fixation zones of the nodule. Loss of MtCOPT1 function results in a copper-mitigated reduction of biomass production when the plant obtains its nitrogen exclusively from symbiotic nitrogen fixation. Mutation of MtCOPT1results in diminished nitrogenase activity in nodules, likely an indirect effect from the loss of a copper-dependent function, such as cytochrome oxidase activity in copt1-1 bacteroids. These data are compatible with a model in which MtCOPT1 transports copper from the apoplast into nodule cells to provide copper for essential metabolic processes associated with symbiotic nitrogen fixation.
International
No
Congress
Reunión de la Sociedad Española de Fisiología Vegetal
970
Place
Reviewers
Si
ISBN/ISSN
0000000000
Start Date
26/06/2017
End Date
29/06/2017
From page
212
To page
212
Reunión de la Sociedad Española de Fisiología Vegetal
Participants
  • Autor: Marta Senovilla Ramos (UPM)
  • Autor: M del Rosario Castro Rodriguez (UPM)
  • Autor: Isidro Abreu Sanchez (UPM)
  • Autor: Viviana Pamela Escudero Welsch (UPM)
  • Autor: Juan Imperial Ródenas (UPM)
  • 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
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