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Carbon and nitrogen gain during the growth of orchid seedlings in nature

Titelangaben

Stöckel, Marcus ; Těšitelová, Tamara ; Jersáková, Jana ; Bidartondo, Martin I. ; Gebauer, Gerhard:
Carbon and nitrogen gain during the growth of orchid seedlings in nature.
In: New Phytologist. Bd. 202 (2014) Heft 2 . - S. 606-615.
ISSN 1469-8137
DOI: https://doi.org/10.1111/nph.12688

Abstract

•For germination and establishment orchids depend on carbon and nutrients supplied by mycorrhizal fungi. As adults the majority of orchids then appear to become autotrophic. To compare the proportional carbon and nitrogen gain from fungi in mycoheterotrophic seedlings and in adults, here we examine in the field carbon and nitrogen stable isotope compositions in seedlings and adults of orchids associated with ectomycorrhizal and saprotrophic fungi. •Using a new highly sensitive approach, we measured the isotope compositions of seedlings and adults of four orchid species belonging to different functional groups: fully and partially mycoheterotrophic orchids associated with narrow or broad sets of ectomycorrhizal fungi, and two adult putatively autotrophic orchids associated exclusively with saprotrophic fungi. •Seedlings of orchids associated with ectomycorrhizal fungi were enriched in 13C and 15N similarly to fully mycoheterotrophic adults. Seedlings of saprotroph-associated orchids were also enriched in 13C and 15N, but unexpectedly their enrichment was significantly lower making them hardly distinguishable from their respective adult stages and neighbouring autotrophic plants. •We conclude that partial mycoheterotrophy among saprotroph-associated orchids cannot be identified unequivocally based on carbon and nitrogen isotope compositions alone. Thus, partial mycoheterotrophy may be much more widely distributed among orchids than hitherto assumed.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER120300
Institutionen der Universität: Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 22 Jul 2015 05:41
Letzte Änderung: 22 Jul 2015 05:41
URI: https://eref.uni-bayreuth.de/id/eprint/16970