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Updated: Jun 25, 2026

A Cell-to-cell Macromolecular Transport Assay in Planta Utilizing Biolistic Bombardment
Published on: August 27, 2010
K+ transport in plants: physiology and molecular biology
Mark W Szczerba1, Dev T Britto, Herbert J Kronzucker
1Department of Plant Sciences, University of California, Davis, 1 Shields Ave., Davis, CA 95616, USA. mwszczerba@ucdavis.edu
Abstract:
Potassium (K(+)) is an essential nutrient and the most abundant cation in plant cells. Plants have a wide variety of transport systems for K(+) acquisition, catalyzing K(+) uptake across a wide spectrum of external concentrations, and mediating K(+) movement within the plant as well as its efflux into the environment. K(+) transport responds to variations in external K(+) supply, to the presence of other ions in the root environment, and to a range of plant stresses, via Ca(2+) signaling cascades and regulatory proteins. This review will summarize the molecular identities of known K(+) transporters, and examine how this information supports physiological investigations of K(+) transport and studies of plant stress responses in a changing environment.
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