Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Potassium (K+) gradients serve as a mobile energy source in plant vascular tissues.
Year:2011
Research Areas
  • Plants and animal biology and ecology
Information
Abstract
The essential mineral nutrient potassium (K(+)) is the most important inorganic cation for plants and is recognized as a limiting factor for crop yield and quality. Nonetheless, it is only partially understood how K(+) contributes to plant productivity. K(+) is used as a major active solute to maintain turgor and to drive irreversible and reversible changes in cell volume. K(+) also plays an important role in numerous metabolic processes, for example, by serving as an essential cofactor of enzymes. Here, we provide evidence for an additional, previously unrecognized role of K(+) in plant growth. By combining diverse experimental approaches with computational cell simulation, we show that K(+) circulating in the phloem serves as a decentralized energy storage that can be used to overcome local energy limitations. Posttranslational modification of the phloem-expressed Arabidopsis K(+) channel AKT2 taps this "potassium battery," which then efficiently assists the plasma membrane H(+)-ATPase in energizing the transmembrane phloem (re)loading processes.
International
Si
JCR
Si
Title
Proceedings of the National Academy of Sciences of the United States of America
ISBN
0027-8424
Impact factor JCR
9,771
Impact info
Datos JCR del año 2010 times cited: 10 (05.12.2012)
Volume
108
Journal number
From page
864
To page
869
Month
ENERO
Ranking
3/56 MULTIDISCIPLINARY SCIENCES (SCI)
Participants
  • Autor: Pawel Gajdanowicz (Universität Potsdam, Germany)
  • Autor: Erwan Michard (Universität Potsdam, Germany)
  • Autor: Michael Sandmann (Universität Potsdam, Germany)
  • Autor: Marcio Rocha (Max-Planck-Institut für Molekulare Pflanzenphysiologie, Golm, Germany)
  • Autor: Luiz Gustavo Guedes Corrêa (Universität Potsdam, Germany)
  • Autor: Santiago J. Ramírez-Aguilar (Max-Planck-Institut für Molekulare Pflanzenphysiologie, Golm, Germany)
  • Autor: Judith Lucia Gomez Porras (UPM)
  • Autor: Wendy Gonzalez (Universidad de Talca, Chile)
  • Autor: Jean-Baptiste Thibaud (INRA Montpellier, France)
  • Autor: Joost T. van Dongen (Max-Planck-Institut für Molekulare Pflanzenphysiologie, Golm, Germany)
  • Autor: Ingo Dreyer . (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Biotecnología
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)