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Sodium transport in plant cells.
- Source :
-
Biochimica et biophysica acta [Biochim Biophys Acta] 2000 May 01; Vol. 1465 (1-2), pp. 140-51. - Publication Year :
- 2000
-
Abstract
- Salinity limits plant growth and impairs agricultural productivity. There is a wide spectrum of plant responses to salinity that are defined by a range of adaptations at the cellular and the whole-plant levels, however, the mechanisms of sodium transport appear to be fundamentally similar. At the cellular level, sodium ions gain entry via several plasma membrane channels. As cytoplasmic sodium is toxic above threshold levels, it is extruded by plasma membrane Na(+)/H(+) antiports that are energized by the proton gradient generated by the plasma membrane ATPase. Cytoplasmic Na(+) may also be compartmentalized by vacuolar Na(+)/H(+) antiports. These transporters are energized by the proton gradient generated by the vacuolar H(+)-ATPase and H(+)-PPiase. Here, the mechanisms of sodium entry, extrusion, and compartmentation are reviewed, with a discussion of recent progress on the cloning and characterization, directly in planta and in yeast, of some of the proteins involved in sodium transport.
- Subjects :
- Arabidopsis
Biological Transport
Carrier Proteins metabolism
Inorganic Pyrophosphatase
Membrane Proteins metabolism
Models, Molecular
Plant Cells
Proton-Translocating ATPases metabolism
Pyrophosphatases metabolism
Saccharomyces cerevisiae
Sodium-Hydrogen Exchangers genetics
Vacuoles metabolism
Arabidopsis Proteins
Cation Transport Proteins
Plant Proteins
Plants metabolism
Sodium metabolism
Sodium-Hydrogen Exchangers metabolism
Symporters
Subjects
Details
- Language :
- English
- ISSN :
- 0006-3002
- Volume :
- 1465
- Issue :
- 1-2
- Database :
- MEDLINE
- Journal :
- Biochimica et biophysica acta
- Publication Type :
- Academic Journal
- Accession number :
- 10748251
- Full Text :
- https://doi.org/10.1016/s0005-2736(00)00135-8