Responses of rhizosphere fungi to the root economics space in grassland monocultures of different age

Recent studies on root traits have shown that there are two axes explaining trait variation belowground: the collaboration axis with mycorrhizal partners and the conservation (‘fast – slow’) axis. However, it is yet unknown whether these trait axes affect the assembly of soilborne fungi. We expect s...

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Bibliographic Details
Published in:The New phytologist Vol. 240; no. 5; pp. 2035 - 2049
Main Authors: Hennecke, Justus, Bassi, Leonardo, Mommer, Liesje, Albracht, Cynthia, Bergmann, Joana, Eisenhauer, Nico, Guerra, Carlos A., Heintz‐Buschart, Anna, Kuyper, Thomas W., Lange, Markus, Solbach, Marcel Dominik, Weigelt, Alexandra
Format: Journal Article
Language:English
Published: England Wiley Subscription Services, Inc 01.12.2023
Subjects:
Abundance
Arbuscular mycorrhizas
Axes (reference lines)
Collaboration
Colonization
Community composition
community structure
Composition
Conservation
Cooperation
economics
fungal communities
Fungi
Fungi - physiology
Grassland
Grasslands
Guilds
Hypotheses
Monoculture
Mycorrhizae - physiology
Pathogens
Plant Roots - microbiology
Plant species
Plants - microbiology
Relative abundance
Rhizosphere
saprotrophs
Soil
Soil Microbiology
Species richness
vesicular arbuscular mycorrhizae
root economics space
root traits
plant-fungi interactions
saprotrophic fungi
pathogenic fungi
arbuscular mycorrhiza
collaboration gradient
rhizosphere
ISSN:0028-646X, 1469-8137, 1469-8137
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Summary:Recent studies on root traits have shown that there are two axes explaining trait variation belowground: the collaboration axis with mycorrhizal partners and the conservation (‘fast – slow’) axis. However, it is yet unknown whether these trait axes affect the assembly of soilborne fungi. We expect saprotrophic fungi to link to the conservation axis of root traits, whereas pathogenic and arbuscular mycorrhizal fungi link to the collaboration axis, but in opposite directions, as arbuscular mycorrhizal fungi might provide pathogen protection. To test these hypotheses, we sequenced rhizosphere fungal communities and measured root traits in monocultures of 25 grassland plant species, differing in age. Within the fungal guilds, we evaluated fungal species richness, relative abundance and community composition. Contrary to our hypotheses, fungal diversity and relative abundance were not strongly related to the root trait axes. However, saprotrophic fungal community composition was affected by the conservation gradient and pathogenic community composition by the collaboration gradient. The rhizosphere AMF community composition did not change along the collaboration gradient, even though the root trait axis was in line with the root mycorrhizal colonization rate. Overall, our results indicate that in the long term, the root trait axes are linked with fungal community composition.
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ISSN:0028-646X
1469-8137
1469-8137
DOI:10.1111/nph.19261