Molecular and functional characterization of a novel low-affinity cation transporter (LCT1) in higher plants.

ABSTRACT: The transport of cations across membranes in higher plants plays an essential role in many physiological processes including mineral nutrition, cell expansion, and the transduction of environmental signals. In higher plants the coordinated expression of transport mechanisms is essential for specialized cellular processes and for adaptation to variable environmental conditions. To understand the molecular basis of cation transport in plant roots, a Triticum aestivum cDNA library was used to complement a yeast mutant deficient in potassium (K+) uptake. Two genes were cloned that complemented the mutant: HKT1 and a novel cDNA described in this report encoding a cation transporter, LCT1 (low-affinity cation transporter). Analysis of the secondary structure of LCT1 suggests that the protein con

SUBMITTER: Schachtman DP 

PROVIDER: S-EPMC23614 | biostudies-literature | 1997 Sep

REPOSITORIES: biostudies-literature