Glass, A.Britto, D.Kaiser, B.Kronzucker, H.Kumar, A.Okamoto, M.Rawat, S.Siddiqi, M.Silim, S.Vidmar, J.Zhuo, D.2007-07-052007-07-052001Journal of Plant Nutrition and Soil Science, 2001; 164(2):199-2071436-87301522-2624http://hdl.handle.net/2440/34541The definitive version may be found at www.wiley.comPhysiological methods, especially the use of isotopes of N, have allowed for the detailed characterizations of the several putative transport systems for nitrate and ammonium in roots of higher plants. In the last decade, the cloning of genes that appear to encode both high- and low-affinity transporters represent major advances, as well as substantiating the inferences based on earlier physiological methods. Nevertheless, the unexpected plethora of genes that have been identified now presents even greater challenges, to resolve their individual functions and to attempt to place these functions in a whole plant/environmental context.en© WILEY-VCH Verlag GmbH, D-69451 Weinheim, 2001NitrateammoniumtransporteruptakedemandJournal article002006329510.1002/1522-2624(200104)164:2<199::AID-JPLN199>3.0.CO;2-K2-s2.0-000071796651025Okamoto, M. [0000-0002-2989-607X]