, Volume 301, Issue 1-2, pp 1-15

Monovalent cation transporters; establishing a link between bioinformatics and physiology

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Abstract

Monovalent cations such as potassium (K+) and ammonium \({\left( {{\text{NH}}^{ + }_{4} } \right)}\) are essential to plant growth and development whereas others, such as sodium (Na+), can greatly inhibit plant growth. To understand and potentially manipulate the roles of these monovalent cations, a detailed knowledge is required about how they move in, out, and throughout plants, processes that are mediated by membrane transporters. The application of genomics and post-genomics methods has provided an overall idea of the genes that encode membrane transporters and in combination with functional analyses we now have a more detailed picture of which proteins are involved in particular biological functions. This review will give an overview of the gene families that are involved in monovalent cation transport, their members and their broad functional classification. Subsequently, an update will be provided on the identity and the roles of specific isoforms with regard to important physiological processes such as the uptake, long distance transport and compartmentation of K+ and Na+ and the uptake from the soil of \({ {{\text{NH}}^{ + }_{4} } }\) .

Responsible Editor: Yongguan Zhu.