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nph12272-sup-0001-FigsS1-S3.docWord document3401K

Fig. S1 Molecular identification and morphological characterization of ectomycorrhizal fungal species found on beech roots.

Fig. S2 Validation of the freeze-drying method to measure soil microbial biomass N in forest soil from Tuttlingen (Ah horizon, 0–10 cm soil depth).

Fig. S3 15N signature after 18 months of exposure to labelled leaf litter in relation to the N concentration in soil, fine roots and EMF root tips (A) and in relation to the estimated N content in the fungal mantle of root tips (B).

nph12272-sup-0002-TablesS1-S3.docxWord document64K

Table S1 Fungal taxa identified in hyphae from litter bags filled with beech (Fagus sylvatica) litter

Table S2 Temporal variation of the relative abundance of ectomycorrhizal fungal species on beech roots

Table S3 Natural abundance of δ15N and N concentrations in root tips colonized with different ectomycorrhizal fungi and in fine roots and soil