Inward-rectifying K+ channels in guard cells provide a mechanism for low-affinity K+ uptake.

@article{Schroeder1991InwardrectifyingKC,
  title={Inward-rectifying K+ channels in guard cells provide a mechanism for low-affinity K+ uptake.},
  author={Julian I Schroeder and Herbert H. P. Fang},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1991},
  volume={88 24},
  pages={11583-7}
}
The molecular mechanisms by which higher plant cells take up K+ across the plasma membrane (plasmalemma) remain unknown. Physiological transport studies in a large number of higher plant cell types, including guard cells, have suggested that at least two distinct types of K(+)-uptake mechanisms exist, permitting low-affinity and high-affinity K+ accumulation, respectively. Recent patch clamp studies have revealed the presence of inward-conducting (inward-rectifying) K+ channels in the plasma… CONTINUE READING