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Regulation of K+ Nutrition in Plants

AuthorsRagel, Paula ; Raddatz, Natalia; Leidi, Eduardo O. ; Quintero, Francisco J. ; Pardo, José M.
KeywordsPlant nutrition
Long-distance transport
Issue Date20-Mar-2019
PublisherFrontiers Media
CitationFrontiers in Plant Science (10): 281 (2019)
AbstractModern 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.
Description21 páginas.-- 4 figuras.-- 2 tablas.-- 216 referencias
Publisher version (URL)http://dx.doi.org/10.3389/fpls.2019.00281
Appears in Collections:(IRNAS) Artículos
(IBVF) Artículos
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