Mineral nitrogen nutrition of Fagus sylvatica L roots colonized by ectomycorrhizal fungi in native forest soil

The aim of this study was to examine the transcription-level response of a
symbiotic system comformed by the host tree Fagus sylvatica L (European
beech) and the root-associated mycobiota to fluctuations in ammonium and
nitrate availability in the soil. The experiment was conducted with young
trees grown at a natural regeneration forest. We used 15N stable isotopes
in combination with DNA-based and RNA-based molecular methods and Illumina
sequencing. We report data on the beech root-associated fungal community
structure obtained by metabarcoding of the fungal ITS2 region,
transcriptome data from the fungal community associated to the tree roots,
and transcriptome data from Fagus sylvatica L in response to ammonium or
nitrate application to the soil. We also report data from soil ammonium-N,
soil-nitrate-N, tree and soil dry mass, root 15N, root N, root C, root
carbohydrates, root ammonium-N, root nitrate-N, soil pH, and climate data
from the experiment.