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Title (Primary) Elodea nuttallii: uptake, translocation and release of phosphorus
Title (Secondary) Structure and function of shallow lakes, Shallow Lakes 2008, Punta del Este-Uruguay
Author Angelstein, S.; Schubert, H.;
Year 2008
Department SEEFO;
Language englisch;
Abstract In Europe Elodea nuttallii is an invasive species, colonizing an astonishing broad range of environments ranging from oligo-mesotrophic waters up to highly eutrophic environments. Therefore it is important to determine its potential impact on the phosphorus cycle, particularly in nutrient poor lake ecosystems. To get insight into its impact on the phosphorous cycles, absorption, transport and release of phosphorus by E. nuttallii plants were studied using ³³P. The experiments were conducted in a two-compartment apparatus for translocation studies and in non-partitioned Erlenmeyer flasks for the determination of uptake kinetics. The plants absorbed phosphorus via both roots and shoots. The phosphorus uptake via shoots exceeded the phosphorus uptake via roots significantly. The absorbed phosphorus was equally translocated via acripetal or basipetal movements, and was incorporated in all parts of the plants tested. The determined phosphorus incorporation rate (IR) was nearly five times lower if phosphorus was fed to the root system, than the IR if phosphorus was fed to the shoot. Additionally, we detected clear evidences for phosphorus recycling via plants. Phosphorus recycling processes have a substantial impact on the balance of phosphorus acquisition by E. nuttallii. Based on the presented results, it can be considered that the phosphorus uptake via shoots is the preferred way of phosphorus uptake for E. nuttallii plants. Anyhow, in nutrient poor environments the slower uptake rate of roots in comparison to the faster absorption via shoots might be sufficient to meet the phosphorus requirement of a whole E. nuttallii plant. Our results suggest that the impact of a potential leakage of phosphorus via shoots on lake water might be small.
ID 9751
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=9751
Angelstein, S., Schubert, H. (2008):
Elodea nuttallii: uptake, translocation and release of phosphorus
Structure and function of shallow lakes, Shallow Lakes 2008, Punta del Este-Uruguay