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PMID: 19794841 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Review

Plant NHX cation/proton antiporters.

Plant signaling & behavior ·Vol. 4 ·No. 4 ·2009-04-00 ·Pages 265-76

Rodríguez-Rosales MP, Gálvez FJ, Huertas R, Aranda MN, Baghour M, Cagnac O, Venema K

Abstract

Although physiological and biochemical data since long suggested that Na(+)/H(+) and K(+)/H(+) antiporters are involved in intracellular ion and pH regulation in plants, it has taken a long time to identify genes encoding antiporters that could fulfil these roles. Genome sequencing projects have now shown that plants contain a very large number of putative Cation/Proton antiporters, the function of which is only beginning to be studied. The intracellular NHX transporters constitute the first Cation/Proton exchanger family studied in plants. The founding member, AtNHX1, was identified as an important salt tolerance determinant and suggested to catalyze Na(+) accumulation in vacuoles. It is, however, becoming increasingly clear, that this gene and other members of the family also play crucial roles in pH regulation and K(+) homeostasis, regulating processes from vesicle trafficking and cell expansion to plant development.

Keywords
NHX-type ion transporters pH regulation plant membrane vesicles potassium homeostasis salt tolerance
MeSH Terms
Gene Expression Regulation, Plant Genes, Plant Homeostasis Hydrogen-Ion Concentration Phylogeny Plant Proteins/genetics,metabolism Potassium/metabolism Potassium-Hydrogen Antiporters/genetics,metabolism Salt-Tolerant Plants/genetics,metabolism Sodium/metabolism Sodium-Hydrogen Exchangers/genetics,metabolism Vacuoles/metabolism
Chemicals
Plant Proteins Potassium-Hydrogen Antiporters Sodium-Hydrogen Exchangers Sodium Potassium
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
Rodríguez-Rosales M Pilar
Department of Biochemistry, Estación Experimental del Zaidín, CSIC, Granada, Spain.
Gálvez Francisco J
Huertas Raúl
Aranda M Nieves
Baghour Mourad
Cagnac Olivier
Venema Kees
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Article Info
Journal
Plant signaling & behavior
Abbr.
Plant Signal Behav
ISSN
1559-2324
DOI
10.4161/psb.4.4.7919
Published
2009-04-00
Pages
265-76
Language
English
Region
United States
NLM ID
101291431
PMCID
PMC2664485
Subset
IM
External Links
PubMed source DOI: 10.4161/psb.4.4.7919 PMC Full Text View journal details
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