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Memorias de investigación
Communications at congresses:
Medicago truncatula copper transporter 1 (MtCOPT1) delivers copper for symbiotic nitrogen fixation
Year:2017
Research Areas
  • 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 cupro-proteins. COPT family members are likely candidates to mediate copper uptake by rhizobiainfected 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 MtCOPT1 results 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 consistent 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
Si
Congress
International Nitrogen Fixation Conference
960
Place
Reviewers
Si
ISBN/ISSN
0000000000
Start Date
03/09/2017
End Date
07/09/2017
From page
147
To page
147
International Nitrogen Fixation Conference
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
  • Departamento: Biotecnología - Biología Vegetal
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