Potassium is the most abundant plant nutrient present in the plants. Plants may accumulate K between 2 and 10 % of plant dry weight. Potassium content below 10 g kg−1 of dry weight may lead to deficiency symptoms in most of the plant species.
A large number of proteins encoded by their corresponding genes are involved in K+ transport in plants. These transporters fall into several categories and have distinct functions. Location of the transporters in different parts of the plant, their subcellular localisation, structure and functions have been discussed.
KeywordsGuard Cell Transporter Classification Shaker Channel Slow Vacuolar Channel Jagged Lateral Organ
- Allen GJ, Sanders D (1997) Vacuolar ion channels of higher plants. Adv Bot Res 25:218–252Google Scholar
- Balague C, Lin B, Alcon C, Flottes G, Malmstrom S, Kohler C, Neuhaus G, Pelletier G, Gaymard F, Roby D (2003) HLM1, an essential signaling component in the hypersensitive response, is a member of the cyclic nucleotide-gated channel ion channel family. Plant Cell 15:365–379CrossRefPubMedCentralPubMedGoogle Scholar
- Flowers TJ, Läuchli A (1983) Sodium versus potassium: substitution and compartmentation. In: Läuchli A, Bieleski RL (eds) Inorganic plant nutrition, vol 15B. Springer, Berlin, pp 651–681Google Scholar
- Gaymard F, Cerutti M, Horeau C, Lemaillet G, Urbach S, Ravallec M, Devauchelle G, Sentenac H, Thibaud J-B (1996) The baculovirus/insect cell system as an alternative to Xenopus oocytes, first characterization of the AKT1 K+ channel from Arabidopsis thaliana. J Biol Chem 271:22863–22870CrossRefPubMedGoogle Scholar
- Hosy E, Vavasseur A, Mouline K, Dreyer I, Gaymard F, Poree F, Boucherez J, Lebaudy A, Bouchez D, Very A-A et al (2003) The Arabidopsis outward K+ channel GORK is involved in regulation of stomatal movements and plant transpiration. Proc Natl Acad Sci U S A 100:5549–5554CrossRefPubMedCentralPubMedGoogle Scholar
- Li F (2006) Potassium and water interaction, international workshop on soil potassium and K-fertiliser interaction, Agricultural College, Guangxi University, Nanning Guangxi-530005, November 14Google Scholar
- Subbarao GV, Ito O, Berry WL, Wheeler RM (2003) Sodium: a functional plant nutrient. Crit Rev Plant Sci 22:391–416Google Scholar
- Uozumi N, Kim EJ, Rubio F, Yamaguchi T, Muto S, Tsuboi A, Bakker EP, Nakamura T, Schroeder JL (2000) The Arabidopsis HKT1 gene homolog mediates inward Na+ currents in Xenopus laevis oocytes and Na+ uptake in Saccharomyces cerevisiae. Plant Physiol 122:1249–1259CrossRefPubMedCentralPubMedGoogle Scholar