Conference Proceedings

The regulation of nitrate and ammonium transport systems in plants

ADM Glass, DT Britto, BN Kaiser, JR Kinghorn, HJ Kronzucker, A Kumar, M Okamoto, S Rawat, MY Siddiqi, SE Unkles, JJ Vidmar

JOURNAL OF EXPERIMENTAL BOTANY | OXFORD UNIV PRESS | Published : 2002

Abstract

Inorganic nitrogen concentrations in soil solutions vary across several orders of magnitude among different soils and as a result of seasonal changes. In order to respond to this heterogeneity, plants have evolved mechanisms to regulate and influx. In addition, efflux analysis using (13)N has revealed that there is a co-ordinated regulation of all component fluxes within the root, including biochemical fluxes. Physiological studies have demonstrated the presence of two high-affinity transporter systems (HATS) for and one HATS for in roots of higher plants. By contrast, in Arabidopsis thaliana there exist seven members of the NRT2 family encoding putative HATS for and five members of the AMT1..

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University of Melbourne Researchers