Fungal carbon sources in a pine forest: evidence from a 13C-labeled global change experiment
作者： Erik A. Hobbie , Kirsten S. Hofmockel , Linda T.A. van Diepen , Erik A. Lilleskov , Andrew P. Ouimette
DOI: 10.1016/J.FUNECO.2013.11.001
关键词:
摘要: We used natural abundance 13C:12C (δ13C) and 8 yr of labeling with 13C-depleted CO2 in a Pinus taeda Free Air Enrichment (FACE) experiment to investigate carbon sources saprotrophic fungi, ectomycorrhizal fungi uncertain life history. Sporocarp δ13C identified Sistotrema confluens as ectomycorrhizal, suspected previously from morphological characteristics. Saprotrophic declined by 2 ‰–13 ‰ between ambient elevated treatments corresponded different sources, including surface litter (Rhodocollybia, Mycena), pine cones (Baeospora), wood (Gymnopilus, Pholiota), soil (Ramariopsis). Ectomycorrhizal foliage, surficial 12 ‰ treatments, confirming that these depend on recent photosynthate. The genera correlated slope (4.3 ± 1.2) greater than the expected value one. This suggested Inocybe Cortinarius incorporated some pre-treatment, soil-derived (presumably amino acids) whereas Lactarius Russula only current-year photosynthate or recent, litter-derived carbon. Combining tracer 13C measurements proved powerful technique examine fungi.
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