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Open Access Green as soon as Postprint is submitted to ZB.
Effects of rhizopheric Nitric Oxide (NO) on N uptake in Fagus sylvatica seedlings depend on soil CO2 concentration, soil N availability and N source.
Tree Physiol. 35, 910-920 (2015)
Rhizospheric nitric oxide (NO) and carbon dioxide (CO2) are signalling compounds known to affect physiological processes in plants. Their joint influence on tree nitrogen (N) nutrition, however, is still unknown. Therefore, this study investigated, for the first time, the combined effect of rhizospheric NO and CO2 levels on N uptake and N pools in European beech (Fagus sylvatica L.) seedlings depending on N availability. For this purpose, roots of seedlings were exposed to one of the nine combinations (i.e., low, ambient, high NO plus CO2 concentration) at either low or high N availability. Our results indicate a significant effect of rhizospheric NO and/or CO2 concentration on organic and inorganic N uptake. However, this effect depends strongly on NO and CO2 concentration, N availability and N source. Similarly, allocation of N to different N pools in the fine roots of beech seedlings also shifted with varying rhizospheric gas concentrations and N availability.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Amino Acids ; Ammonium ; Fine Roots ; Nitrate ; Nitrogen Pools ; Soluble Protein; Elevated Carbon-dioxide; Root-zone Co2; Adult European Beech; Inorganic Carbon; Nitrogen Acquisition; Tomato Seedlings; Lettuce Plants; Gas-exchange; Forest Soil; Amino-acids
ISSN (print) / ISBN
0829-318X
e-ISSN
1758-4469
Journal
Tree Physiology
Quellenangaben
Volume: 35,
Issue: 8,
Pages: 910-920
Publisher
Oxford University Press
Publishing Place
Oxford
Reviewing status
Peer reviewed
Institute(s)
Research Unit Environmental Simulation (EUS)