Regulation of K+ nutrition in plants

• Verfasst von: Ragel de la Torre, Paula [VerfasserIn]
• Titel: Regulation of K+ nutrition in plants
• Verf.angabe: Paula Ragel, Natalia Raddatz, Eduardo O. Leidi, Francisco J. Quintero and José M. Pardo
• E-Jahr: 2019
• Jahr: 20 March 2019
• Umfang: 21 S.
• Fussnoten: Gesehen am 11.06.2019 ; "+" hinter K ist hochgestellt
• Titel Quelle: Enthalten in: Frontiers in plant science
• Ort Quelle: Lausanne : Frontiers Media, 2010
• Jahr Quelle: 2019
• Band/Heft Quelle: 10(2019) Artikel-Nummer 281, 21 Seiten
• ISSN Quelle: 1664-462X
• DOI: doi:10.3389/fpls.2019.00281
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Ion Transport
• Sach-SW: Long-distance transport
• Sach-SW: Plant Nutrition
• Sach-SW: Potassium
• Sach-SW: Regulation - physiological
• K10plus-PPN: 1667235001

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.