K transport in plants: Physiology and molecular biology
Mark W Szczerba, Dev T Britto, Herbert J Kronzucker
JOURNAL OF PLANT PHYSIOLOGY | ELSEVIER GMBH | Published : 2009
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 ..View full abstract
We thank Drs. E Blumwaid, E Katz, and V Martinez for useful discussion of this manuscript. The work was supported by grants from the Natural Sciences and Engineering Research Council of Canada (INSERC) and the Canada Research Chair (CRC) program.