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The effect of NH 4+ /NO 3− availability on nitrate reductase (NR) activity in Phragmites australis and Glyceria maxima was studied in sand and water cultures with the goal to characterise the relationship between NR activity and NO 3− availability in the rhizosphere and to describe the extent to which NH 4+ suppresses the utilization of NO 3...
The effects of NH 4+ or NO 3− on growth, resource allocation and nitrogen (N) uptake kinetics of two common helophytes Phragmites australis (Cav.) Trin. ex Steudel and Glyceria maxima (Hartm.) Holmb. were studied in semi steady-state hydroponic cultures. At a steady-state nitrogen availability of 34μM the growth rate of Phragmites was not affected by the N form (mean RGR=35...
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