Article
Control of vacuolar dynamics and regulation of stomatal aperture by tonoplast potassium uptake.
Proceedings of the National Academy of Sciences of the United States of America - 29 Apr 2014
Andrés Zaida, Pérez-Hormaeche Javier, Leidi Eduardo O, Schlücking Kathrin, Steinhorst Leonie, McLachlan Deirdre H, Schumacher Karin, Hetherington Alistair M, Kudla Jörg, Cubero Beatriz, Pardo José M
Abstract excerpt
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...
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