Opened Access Regulation of K+ Nutrition in Plants

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Author: Ragel de la Torre, Paula
Raddatz, Natalia
Leidi Montes, Eduardo Oscar
Quintero, Francisco Javier
Pardo, José María
Department: Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
Date: 2019
Published in: Frontiers in Plant Science, 10 (281), 1-21.
Document type: Article
Abstract: Modern 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.
Cite: Ragel 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.
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DOI: 10.3389/fpls.2019.00281

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