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231225s2003 xx |||||o 00| ||eng c |
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|a 10.1046/j.1469-8137.2003.00872.x
|2 doi
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|a eng
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|a Gebauer, G
|e verfasserin
|4 aut
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|a 15 N and 13 C natural abundance of autotrophic and myco-heterotrophic orchids provides insight into nitrogen and carbon gain from fungal association
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|c 2003
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 20.04.2021
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a • Whereas mycorrhizal fungi are acknowledged to be the sources of nitrogen (N) and carbon (C) in achlorophyllous (myco-heterotrophic) orchids, the sources of these elements in autotrophic orchids are unknown. We have determined the stable isotope abundance of N and C to quantify their gain from different sources in these two functional groups and in non-orchids of distinctive mycorrhizal types. • Leaves of each plant were collected from four forest and four grassland sites in Europe. The N and C isotope abundance, and total N concentrations of their tissues and of associated soils were determined. • Myco-heterotrophic orchids were significantly more enriched in 15 N (ɛMHO-R = 11.5‰) and 13 C (ɛMHO-R = 8.4‰) than co-occurring non-orchids. δ15 N and δ13 C signatures of autotrophic orchids ranged from values typical of non-orchids to those more representative of myco-heterotrophic orchids. • Utilization of fungi-derived N and C probably explains the relative 15 N and 13 C enrichment in the myco-heterotrophs. A linear two-source isotopic mixing model was used to estimate N and C gain of autotrophic orchids from their fungal associates. Of the putatively autotrophic species, Cephalanthera damasonium obtained the most N and C by the fungal route, but several other species also fell into the partially myco-heterotrophic category
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|a Journal Article
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|a forest
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|a grassland
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|a myco-heterotrophy
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|a mycorrhiza
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|a orchids
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|a stable isotopes
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|a δ13C
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|a δ15N
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|a Meyer, M
|e verfasserin
|4 aut
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|i Enthalten in
|t The New phytologist
|d 1979
|g 160(2003), 1 vom: 20. Okt., Seite 209-223
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|x 1469-8137
|7 nnns
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| 773 |
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|g volume:160
|g year:2003
|g number:1
|g day:20
|g month:10
|g pages:209-223
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|u http://dx.doi.org/10.1046/j.1469-8137.2003.00872.x
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