Ontology highlight
ABSTRACT:
SUBMITTER: Andres Z
PROVIDER: S-EPMC4035970 | biostudies-literature | 2014 Apr
REPOSITORIES: biostudies-literature
Andrés Zaida Z Pérez-Hormaeche Javier J Leidi Eduardo O EO Schlücking Kathrin K Steinhorst Leonie L McLachlan Deirdre H DH Schumacher Karin K Hetherington Alistair M AM Kudla Jörg J Cubero Beatriz B Pardo José M JM
Proceedings of the National Academy of Sciences of the United States of America 20140414 17
Stomatal movements rely on alterations in guard cell turgor. This requires massive K(+) bidirectional fluxes across the plasma and tonoplast membranes. Surprisingly, given their physiological importance, the transporters mediating the energetically uphill transport of K(+) into the vacuole remain to be identified. Here, we report that, in Arabidopsis guard cells, the tonoplast-localized K(+)/H(+) exchangers NHX1 and NHX2 are pivotal in the vacuolar accumulation of K(+) and that nhx1 nhx2 mutant ...[more]