Exogenously Supplied Compatible Solutes Rapidly Ameliorate NaCl-induced Potassium Efflux from Barley Roots

• Published in: Plant and cell physiology Vol. 46; no. 12; pp. 1924 - 1933
• Main Authors: Cuin, Tracey Ann, Shabala, Sergey
• Format: Journal Article
• Language: English
• Published: Japan Oxford University Press 01.12.2005; Oxford Publishing Limited (England)
• Subjects: AFS; apparent free space; Barley; Betaine; Betaine - metabolism; Betaine - pharmacology; calcium; Calcium - metabolism; Cell Membrane; Cell Membrane - drug effects; Cell Membrane - physiology; chemistry; DAPC; depolarization-activated outward-rectifying potassium channel; drug effects; Electrochemistry; H+ extrusion; homeostasis; Homeostasis - drug effects; Homeostasis - physiology; Hordeum; Hordeum - drug effects; Hordeum - metabolism; Hordeum vulgare; Ion transport; K+ homeostasis; liquid ion exchanger; LIX; Membrane Potentials; Membrane Potentials - drug effects; metabolism; microelectrode ion flux; microelectrode ion flux measuring technique; Microelectrodes; MIFE; Oxidative Stress; pharmacology; physiology; plant physiology; plant response; Plant Roots; Plant Roots - chemistry; Plant Roots - drug effects; Plant Roots - metabolism; plasma membrane; potassium; Potassium - metabolism; Potassium Channels; Potassium Channels - drug effects; Proline; Proline - pharmacology; Proton-Translocating ATPases; Proton-Translocating ATPases - physiology; Protons; Roots; Salinity; salt stress; Salt tolerance; Sodium; Sodium - metabolism; Sodium chloride; Sodium Chloride - pharmacology; Solutes; Stress adaptation; Time Factors; Transport processes

It has been suggested that the role of compatible solutes in plant stress responses is not limited to conventional osmotic adjustment, but also includes some other regulatory or osmoprotective functions. In this study, we hypothesized that one such function is in maintaining cytosolic K⁺ homeostasis...