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15N and 13C natural abundance of two mycoheterotrophic and a putative partially mycoheterotrophic species associated with arbuscular mycorrhizal fungi

Title data

Merckx, Vincent ; Stöckel, Marcus ; Fleischmann, Andreas ; Bruns, Thomas D. ; Gebauer, Gerhard:
15N and 13C natural abundance of two mycoheterotrophic and a putative partially mycoheterotrophic species associated with arbuscular mycorrhizal fungi.
In: New Phytologist. Vol. 188 (2010) Issue 2 . - pp. 590-596.
ISSN 1469-8137
DOI: https://doi.org/10.1111/j.1469-8137.2010.03365.x

Abstract in another language

• In contrast to mycoheterotrophs that associate with ectomycorrhizal and saprotrophic fungi, we know little about the ecophysiology of arbuscular mycorrhizal mycoheterotrophs. Here, we identify the mycorrhizal fungi of two unrelated mycoheterotrophs and one putative partial mycoheterotroph that form arbuscular mycorrhizas, and analyse their carbon (C) and nitrogen (N) isotope signatures. • We used molecular methods to identify the mycorrhizal fungi of Dictyostega orobanchoides, Burmannia capitata (Burmanniaceae) and Voyria aphylla (Gentianaceae). Their C and N sources were investigated by analysing their stable isotope natural abundances (δ13C and δ15N). In addition, four putative partially mycoheterotrophic Burmannia species were grown ex situ. • We found that both mycoheterotrophs and a green Burmannia species are associated with nonoverlapping Glomeromycota fungi. The investigated mycoheterotrophs are significantly more enriched in 13C than co-occurring autotrophic plants but lack significant 15N enrichment. The green Burmannia species is not significantly enriched in 13C and 15N compared with surrounding plants and can grow fully autotrophically under controlled conditions. • Our results suggest that mycoheterotrophic Burmanniaceae and Gentianaceae are able to exploit arbuscular mycorrhizal fungi. Green relatives of mycoheterotrophic Burmanniaceae from high-light grassland sites also associate with arbuscular mycorrhizal fungi but we found no evidence that they receive detectable amounts of C from fungi.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER84394
Institutions of the University: Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 07 Aug 2015 06:59
Last Modified: 07 Aug 2015 06:59
URI: https://eref.uni-bayreuth.de/id/eprint/17705