Mycorrhizal symbiosis changes host nitrogen source use
Savolainen, T., & Kytöviita, M.-M. (2022). Mycorrhizal symbiosis changes host nitrogen source use. Plant and Soil, 471(1-2), 643-654. https://doi.org/10.1007/s11104-021-05257-5
Published in
Plant and SoilDate
2022Copyright
© The Author(s) 2021
Purpose
The ecological importance of arbuscular mycorrhizal fungi (AMF) in plant acquisition of inorganic and organic sources of nitrogen (N) is not clear. To improve understanding of the plant N nutrition ecology, we tested the effect of intraspecific competition and AMF in plant N source use in growth and N acquisition.
Methods
Solidago virgaurea was grown in microcosms in a fully factorial experiment under greenhouse conditions. The factors tested were intraspecific competition between seedlings and adult plants (yes, no), N source (NH4, glycine) and AMF (inoculated with Glomus hoi, not inoculated).
Results
When grown separately, non-mycorrhizal seedling growth was highest when grown with ammonium, but non-mycorrhizal adults grew best with glycine as the sole N source. Mycorrhizal symbiosis with Glomus hoi evened out this initial niche partitioning in terms of differences in N source use and all mycorrhizal plants grew best with ammonium. Competition shaped plant benefit from mycorrhizal symbiosis depending on the N source. Competition reduced mycorrhizal growth benefit in glycine-grown seedlings, but not in adults. Plant performance did not show uniform relationship with δ15N, but δ15N was affected by life stage, competition and mycorrhiza.
Conclusions
Plant competition and AMF shape plant N source use. Plant and AMF benefit of the symbiosis depend on the N source.
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Publisher
Springer Science+Business MediaISSN Search the Publication Forum
0032-079XKeywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/103446925
Metadata
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Related funder(s)
Finnish Cultural FoundationFunding program(s)
FoundationAdditional information about funding
Open Access funding provided by University of Jyväskylä (JYU). This work was supported by Central Finland Regional Fund (TS), University of Jyväskylä (TS, MMK), the Finnish Cultural Foundation (TS) and Academy of Finland (MMK, grant number 127 657).License
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