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  Mycorrhizal vs saprotrophic status of fungi: the isotopic evidence

Hobbie, E. A., Weber, N. S., & Trappe, J. M. (2001). Mycorrhizal vs saprotrophic status of fungi: the isotopic evidence. New Phytologist, 150(3), 601-610. doi:10.1046/j.1469-8137.2001.00134.x.

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BGC0352.pdf (Verlagsversion), 629KB
 
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 Urheber:
Hobbie, E. A.1, Autor           
Weber, N. S., Autor
Trappe, J. M., Autor
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1Department Biogeochemical Systems, Prof. D. Schimel, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497754              

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Schlagwörter: Mycorrhizal fungi Saprotrophic fungi Stable isotopes Carbon dynamics Nitrogen dynamics Molecular phylogeny Fungal evolution N-15 natural-abundance Ectomycorrhizal fungi Fruit bodies Nitrogen Plant c-13 Carbon Fractionation Forests Oregon
 Zusammenfassung: Relative abundances of carbon and nitrogen isotopes in fungal sporocarps are useful in assessing mycorrhizal or saprotrophic status, and might provide insights into the evolutionary history of these traits. Sporocarps of known mycorrhizal or saprotrophic genera were collected at Woods Creek, OR, USA, and isotopically compared with foliage, litter, soils and wood collected from the same site. Possible trophic strategies were then isotopically assessed in archived specimens of the Pezizales of known molecular phylogeny from the western United States. At Woods Creek, mycorrhizal fungi were 3.5 parts per thousand +/- 0.6 parts per thousand depleted in sigma C-13 and 5.7 parts per thousand +/- 0.4 parts per thousand enriched in sigma N-15 compared with saprotrophic fungi. By contrast, fungi from four genera of uncertain mycorrhizal status (Clavulina, Helvella, Otidia, and Ramaria) were only 0.4 parts per thousand +/- 0.4 parts per thousand enriched in sigma C-13 and 1.2 parts per thousand +/- 1.1 parts per thousand depleted in sigma N-15 relative to mycorrhizal fungi. In archived samples, the sigma C-13 measurements appeared to be a better indicator of trophic strategy than sigma N-15 measurements. The sigma C-13 measurements suggested that mycorrhizal or saprotrophic status was conserved within families of the Pezizales (as determined by molecular phylogeny), with the Helvellaceae and Tuberaceae mycorrhizal and Discinaceae and Morchellaceae being largely saprotrophic. (C) New Phytologist (2001). [References: 35]

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 Datum: 2001
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DOI: 10.1046/j.1469-8137.2001.00134.x
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Titel: New Phytologist
  Andere : New Phytol.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Academic Press.
Seiten: - Band / Heft: 150 (3) Artikelnummer: - Start- / Endseite: 601 - 610 Identifikator: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695