Aufnahme von 15NO2 und Einbau des 15NO2-Stickstoffs in verschiedene Stickstofffraktionen bei Sonnenblumen (Uptake of 15NO2 and Metabolic Transfer of the 15NO2 Nitrogen to Various Nitrogen Fractions of Sunflowers) |
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| Authors: | H.-J. Segschneider H. Hützen H. Förstel P. Rockel J. Wildt |
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| Affiliation: | 1. Institut für Radioagronomie;2. Institut für Biotechnologie;3. Institut für Chemie der Belasteten Atmosph?re , Forschungszentrum Jülich GmbH, Deutschland |
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| Abstract: | ![]()
Abstract Sunflowers were exposed to 15NO2 at a range between 4,9 and 42,0 ppb. The 15NO2 uptake was quantified and the fate of the 15N in different parts and pools of nitrogen was investigated. The very high δ15N-values of the free amino acid pool can't give an answer to the question whether the NO2-nitrogen is incorporated by a different pathway, compared to the nitrogen which derives from root uptake. Or does a compartmentation of the nitrate pool in the plant cell cause a dilution of the 15N enrichment in the mineral nitrogen pool during sample preparation? |
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| Keywords: | Amino acids nitrogen dioxide nitrogen 15 nitrogen uptake tracer techniques sample preparation sunflower |
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