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Reuter, R.* ; Ferlian, O.* ; Tarkka, M.* ; Eisenhauer, N.* ; Pritsch, K. ; Simon, J.*

Tree species rather than type of mycorrhizal association drives inorganic and organic nitrogen acquisition in tree-tree interactions.

Tree Physiol. 41, 2096-2108 (2021)
Publ. Version/Full Text Postprint DOI PMC
Open Access Green
Mycorrhizal fungi play an important role for the nitrogen (N) supply of trees. The influence of different mycorrhizal types on N acquisition in tree-tree interactions is, however, not well understood, particularly with regard to the competition for growth-limiting N. We studied the effect of competition between temperate forest tree species on their inorganic and organic N acquisition in relation to their mycorrhizal type (i.e., arbuscular mycorrhiza or ectomycorrhiza). In a field experiment, we quantified net N uptake capacity from inorganic and organic N sources using 15N/13C stable isotopes for arbuscular mycorrhizal tree species (i.e., Acer pseudoplatanus L., Fraxinus excelsior L., and Prunus avium L.) as well as ectomycorrhizal tree species (i.e., Carpinus betulus L., Fagus sylvatica L., and Tilia platyphyllos Scop.). All species were grown in intra- and interspecific competition (i.e., monoculture or mixture). Our results showed that N sources were not used complementarily depending on a species´ mycorrhizal association, but their uptake rather depended on the competitor indicating species-specific effects. Generally, ammonium was preferred over glutamine and glutamine over nitrate. In conclusion, our findings suggest that inorganic and organic N acquisition of the studied temperate tree species is less regulated by mycorrhizal association, but rather by the availability of specific N sources in the soil as well as the competitive environment of different tree species.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Arbuscular Mycorrhiza ; Competition ; Ectomycorrhiza ; Interspecific Competition ; Intraspecific Competition ; Nitrogen Uptake; Beech Fagus-sylvatica; Plant-soil Feedbacks; Spruce Picea-abies; European Beech; Ectomycorrhizal Fungi; N Uptake; Spatial Differences; Nitrate Influx; Root Exudation; Net Uptake
ISSN (print) / ISBN 0829-318X
e-ISSN 1758-4469
Journal Tree Physiology
Quellenangaben Volume: 41, Issue: 11, Pages: 2096-2108 Article Number: , Supplement: ,
Publisher Oxford University Press
Publishing Place Great Clarendon St, Oxford Ox2 6dp, England
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Research Unit Environmental Simulation (BIOP-EUS)
Grants Heisenberg Fellowship (German Research Foundation)
German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig - German Research Foundation
European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program
Young Scholar Fund (University of Konstanz, Germany)