Ragel de la Torre, PaulaRaddatz, NataliaLeidi Montes, Eduardo OscarQuintero, Francisco JavierPardo, José María2019-04-092019-04-092019Ragel de la Torre, P., Raddatz, N., Leidi Montes, E.O., Quintero, F.J. y Pardo, J.M. (2019). Regulation of K+ Nutrition in Plants. Frontiers in Plant Science, 10 (281), 1-21.1664-462Xhttps://hdl.handle.net/11441/85382Modern agriculture relies on mineral fertilization. Unlike other major macronutrients, potassium (K+) is not incorporated into organic matter but remains as soluble ion in the cell sap contributing up to 10% of the dry organic matter. Consequently, K+ constitutes a chief osmoticum to drive cellular expansion and organ movements, such as stomata aperture. Moreover, K+ transport is critical for the control of cytoplasmic and luminal pH in endosomes, regulation of membrane potential, and enzyme activity. Not surprisingly, plants have evolved a large ensemble of K+ transporters with defined functions in nutrient uptake by roots, storage in vacuoles, and ion translocation between tissues and organs. This review describes critical transport proteins governing K+ nutrition, their regulation, and coordinated activity, and summarizes our current understanding of signaling pathways activated by K+ starvation.application/pdfengAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Plant nutritionPotassiumNitrateRegulationLong-distance transportinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.3389/fpls.2019.00281