Ectomycorrhizal Community Shifts at a Former Uranium Mining Site

GND
1260522253
ORCID
0000-0002-8787-2930
Affiliation
Institute of Microbiology, Friedrich Schiller University Jena, D-07743 Jena, Germany
Bogdanova, Olga;
GND
143604783
ORCID
0000-0002-8777-8004
Affiliation
Institute of Microbiology, Friedrich Schiller University Jena, D-07743 Jena, Germany
Kothe, Erika;
GND
130332887
Affiliation
Institute of Microbiology, Friedrich Schiller University Jena, D-07743 Jena, Germany
Krause, Katrin

Ectomycorrhizal communities at young oak, pine, and birch stands in a former uranium mining site showed a low diversity of morphotypes with a preference for contact and short-distance exploration strategies formed by the fungi Russulaceae , Inocybaceae , Cortinariaceae , Thelephoraceae , Rhizopogonaceae , Tricholomataceae , as well as abundant Meliniomyces bicolor . In order to have better control over abiotic conditions, we established pot experiments with re-potted trees taken from the sites of direct investigation. This more standardized cultivation resulted in a lower diversity and decreased prominence of M. bicolor . In addition, the exploration strategies shifted to include long-distance exploration types. To mimic secondary succession with a high prevalence of fungal propagules present in the soil, inoculation of re-potted trees observed under standardized conditions for two years was used. The super-inoculation increased the effect of lower abundance and diversity of morphotypes. The contact morphotypes correlated with high Al, Cu, Fe, Sr, and U soil contents, the dark-colored short-distance exploration type did not show a specific preference for soil characteristics, and the medium fringe type with rhizomorphs on oaks correlated with total nitrogen. Thus, we could demonstrate that field trees, in a species-dependent manner, selected for ectomycorrhizal fungi with exploration types are likely to improve the plant’s tolerance to specific abiotic conditions.

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