Regeneration of a phosphate-polluted field site : implications of arbuscular mycorrhiza / von Verena Blanke

This work aimed to investigate the structure and function of arbuscular mycorrhiza (AM) in a phosphate-polluted field site. Despite exceedingly high phosphorus (P)-availability, plants were strongly mycorrhizal, although the fungi should not play an essential role in the P-nutrition of hosts, usually their main function. Molecular analyses revealed that fungal diversity was reduced; however, no species were exclusive and thus, maybe adapted to this site. Instead, enriching the nitrogen (N)-level in the N-poor area led to reduced mycorrhization intensities of roots, implying that plants are mycorrhizal due to N-deficiency. Reduced mycorrhization following fungicide treatments led to as well reduced N-concentrations in some plant species, indicating that in fact, AM is able to improve N-nutrition of its hosts at this field site. However, not all species benefited from this mycorrhiza-mediated N-uptake and accordingly, -distribution: even negative mycorrhizal effects could be detected. This is discussed with regard to mycorrhizal responsiveness of different plant species and possible implications of mycorrhizal networks.

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Person: Blanke, Verena [Author]
Corporate Author: Friedrich-Schiller-Universität Jena [Degree granting institution]
Format: Book
Language(s):English
Publication:Jena, 02. April 2007
Printing place:Jena
Dissertation Note:Jena, Univ., Diss., 2007
Subjects:Dorndorf-Steudnitz > Mykorrhiza > Phosphate > Nährstoffaufnahme > Überdüngung > Phylogenie
Type of content:Hochschulschrift
Related resources:Erscheint auch als Online-Ausgabe: Regeneration of a phosphate polluted field site
Physical description:93 Bl. : Ill., graph. Darst. ; 29,5 cm
Basic Classification: 42.90 Ökologie: Allgemeines
43.12 Umweltchemie
Thuringian bibliography:145000 Bodenkunde <Thüringen>
162020 Vegetation. Florenlisten <Thüringen>
Thuringian bibliography