Nitrogen nutrition of poplar trees

Many forest ecosystems have evolved at sites with growth-limiting nitrogen (N) availability, low N input from external sources and high ecosystem internal cycling of N. By contrast, many poplar species are frequent constituents of floodplain forests where they are exposed to a significant ecosystem...

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Bibliographic Details
Published in:Plant biology (Stuttgart, Germany) Germany), 2010-03, Vol.12 (2), p.275-291
Main Authors: Rennenberg, H., Wildhagen, H., Ehlting, B.
Format: Article
Language:English
Subjects:
Amino Acid Transport Systems - metabolism
Amino acid transporter
ammonium transporter
Anion Transport Proteins - metabolism
arginine
BSP
Carbon Dioxide - metabolism
drought
Ecosystem
floodplain forest
glutamine
heat
N cycling
N mobilisation
N storage
N uptake
nitrate tranporter
Nitrogen - metabolism
Ozone - metabolism
Photoperiod
Plant Bark - metabolism
Plant Growth Regulators - metabolism
Populus - metabolism
Populus - physiology
Quaternary Ammonium Compounds - metabolism
salt stress
Seasons
Sodium Chloride - metabolism
Soil - analysis
storage protein
Temperature
Trees - metabolism
VSP
Water - metabolism
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Summary:Many forest ecosystems have evolved at sites with growth-limiting nitrogen (N) availability, low N input from external sources and high ecosystem internal cycling of N. By contrast, many poplar species are frequent constituents of floodplain forests where they are exposed to a significant ecosystem external supply of N, mainly nitrate, in the moving water table. Therefore, nitrate is much more important for N nutrition of these poplar species than for many other tree species. We summarise current knowledge of nitrate uptake and its regulation by tree internal signals, as well as acquisition of ammonium and organic N from the soil. Unlike herbaceous plants, N nutrition of trees is sustained by seasonal, tree internal cycling. Recent advances in the understanding of seasonal storage and mobilisation in poplar bark and regulation of these processes by temperature and daylength are addressed. To explore consequences of global climate change on N nutrition of poplar trees, responses of N uptake and metabolism to increased atmospheric CO(2) and O(3) concentrations, increased air and soil temperatures, drought and salt stress are highlighted.
ISSN:1435-8603
1438-8677
DOI:10.1111/j.1438-8677.2009.00309.x