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Nitrate transporters in plants : structure, function and regulation.

Research output: Contribution to journalJournal article

Published

Journal publication date1/05/2000
JournalBiochimica et Biophysica Acta (BBA) - Biomembranes
Journal number1-2
Volume1465
Number of pages17
Pages219-235
Original languageEnglish

Abstract

Physiological studies have established that plants acquire their NO−3 from the soil through the combined activities of a set of high- and low-affinity NO−3 transport systems, with the influx of NO−3 being driven by the H+ gradient across the plasma membrane. Some of these NO−3 transport systems are constitutively expressed, while others are NO−3-inducible and subject to negative feedback regulation by the products of NO−3 assimilation. Here we review recent progress in the characterisation of the two families of NO−3 transporters that have so far been identified in plants, their structure and their regulation, and consider the evidence for their roles in NO−3 acquisition. We also discuss what is currently known about the genetic basis of NO−3 induction and feedback repression of the NO−3 transport and assimilatory pathway in higher plants.