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Evidence for novel and specialised mycorrhizal parasitism: the orchid Gastrodia confusa gains carbon from saprotrophic Mycena

Title data

Ogura-Tsujita, Yuki ; Gebauer, Gerhard ; Hashimoto, Toshimasa ; Umata, Hidetaka ; Yukawa, Tomohisa:
Evidence for novel and specialised mycorrhizal parasitism: the orchid Gastrodia confusa gains carbon from saprotrophic Mycena.
In: Proceedings of the Royal Society B: Biological Sciences. Vol. 276 (2009) Issue 1657 . - pp. 761-767.
ISSN 0962-8452
DOI: https://doi.org/10.1098/rspb.2008.1225

Abstract in another language

We investigated the physiological ecology of the Asian non-photosynthetic orchid Gastrodia confusa. Werevealed its mycorrhizal partners by using molecular identification and identified its ultimate nutritionalsource by analysing carbon and nitrogen natural stable isotope abundances. Molecular identification usinginternal transcribed spacer and large subunit nrDNA sequences showed that G. confusa associates withseveral species of litter- and wood-decomposer Mycena fungi. The carbon and nitrogen isotope signaturesof G. confusa were analysed together with photosynthetic plant reference samples and samples of theectomycorrhizal epiparasite Monotropa uniflora. We found that G. confusa was highly enriched in 13C butnot greatly in 15N, while M. uniflora was highly enriched in both 13C and 15N. The 13C and 15N signaturesof G. confusa were the closest to those of the fruit bodies of saprotrophic fungi. Our results demonstrate forthe first time using molecular and mass-spectrometric approaches that myco-heterotrophic plants gaincarbon through parasitism of wood or litter decaying fungi. Furthermore, we demonstrate that, severalotherwise free-living non-mycorrhizal, Mycena can be mycorrhizal partners of orchids.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER64096
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: 31 Aug 2021 09:28
URI: https://eref.uni-bayreuth.de/id/eprint/17737