PuSH - Publication Server of Helmholtz Zentrum München: Rhizospheric NO affects N uptake and metabolism in Scots pine (<em>Pinus sylvestris</em> L.) seedlings depending on soil N availability and N source.

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Simon, J.* ; Dong, F.* ; Buegger, F. ; Rennenberg, H.*

Rhizospheric NO affects N uptake and metabolism in Scots pine (Pinus sylvestris L.) seedlings depending on soil N availability and N source.

Plant Cell Environ. 36, 1019-1026 (2013)

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Open Access Green as soon as Postprint is submitted to ZB.

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We investigated the interaction of rhizospheric nitric oxide (NO) concentration (i.e. low, ambient or high) and soil nitrogen (N) availability (i.e. low or high) with organic and inorganic N uptake by fine roots of Pinus sylvestris L. seedlings by (15) N feeding experiments under controlled conditions. N metabolites in fine roots were analysed to link N uptake to N nutrition. NO affected N uptake depending on N source and soil N availability. The suppression of nitrate uptake in the presence of ammonium and glutamine was overruled by high NO. The effects of NO on N uptake with increasing N availability showed different patterns: (1) increasing N uptake regardless of NO concentration (i.e. ammonium); (2) increasing N uptake only with high NO concentration (i.e. nitrate and arginine); and (3) decreasing N uptake (i.e. glutamine). At low N availability and high NO nitrate accumulated in the roots indicating insufficient substrates for nitrate reduction or its storage in root vacuoles. Individual amino acid concentrations were negatively affected with increasing NO (i.e. asparagine and glutamine with low N availability, serine and proline with high N availability). In conclusion, this study provides first evidence that NO affects N uptake and metabolism in a conifer.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Ammonium ; Arginine ; Glutamine ; Inorganic N Uptake ; Nitrate ; No Fumigation ; Organic N Uptake; Beech Fagus-sylvatica ; Nitric-oxide Production ; European Beech ; Amino-acids ; Nitrogen-compounds ; Net Uptake ; Plants ; Nitrate ; Emissions ; Arabidopsis

ISSN (print) / ISBN 0140-7791

e-ISSN 1365-3040

Journal Plant, Cell and Environment

Quellenangaben Volume: 36, Issue: 5, Pages: 1019-1026

Publisher Wiley

Publishing Place Malden, MA

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Soil Ecology (IBOE)