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Suppression of arbuscular mycorrhizal fungal activity in a diverse collection of non-cultivated soils

Cruz-Paredes, Carla LU orcid ; Svenningsen, Nanna Bygvraa ; Nybroe, Ole ; Kjøller, Rasmus ; Frøslev, Tobias Guldberg and Jakobsen, Iver (2019) In FEMS Microbiology Ecology 95(3).
Abstract

Most plants form symbiotic associations with arbuscular mycorrhizal fungi (AMF). AMF increase the uptake of plant nutrients by extending their extra-radical mycelium (ERM) in the soil where other groups of microorganisms may suppress the activity of the ERM. However, little is known about such suppression in natural soils. This work aimed to investigate the incidence of AMF suppression among soils sampled from highly variable natural ecosystems, and used 33P uptake by the ERM to evaluate AMF activity. A second aim was to identify factors behind the observed AMF-suppression. We found that AMF-suppressiveness varied markedly among natural soils and occurred more frequently in low pH than in high pH soils. A previous study for... (More)

Most plants form symbiotic associations with arbuscular mycorrhizal fungi (AMF). AMF increase the uptake of plant nutrients by extending their extra-radical mycelium (ERM) in the soil where other groups of microorganisms may suppress the activity of the ERM. However, little is known about such suppression in natural soils. This work aimed to investigate the incidence of AMF suppression among soils sampled from highly variable natural ecosystems, and used 33P uptake by the ERM to evaluate AMF activity. A second aim was to identify factors behind the observed AMF-suppression. We found that AMF-suppressiveness varied markedly among natural soils and occurred more frequently in low pH than in high pH soils. A previous study for cultivated soils revealed a strong biological component of suppressiveness against AMF, and in accordance we found that the composition of both fungal and bacterial communities differed significantly between AMF-suppressive and non-suppressive natural soils. Acidobacteria, Acidothermus, Xanthomonadaceae, Archaeorhizomyces sp., Mortierella humilis and some Mycena spp. were significantly more abundant in AMF-suppressive soils and may therefore be direct antagonists of AMF. This implies that the functioning of AMF in natural ecosystems is strongly modulated by specific soil microbes.

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author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Arbuscular mycorrhizal fungi, Interactions, Microbiome, Natural ecosystems, Suppressive soil
in
FEMS Microbiology Ecology
volume
95
issue
3
article number
fiz020
pages
10 pages
publisher
Oxford University Press
external identifiers
  • pmid:30715290
  • scopus:85063905185
ISSN
0168-6496
DOI
10.1093/femsec/fiz020
language
English
LU publication?
no
additional info
Funding Information: This work was supported by Novo Nordisk Foundation [NNF16OC0021576 to I.J]. Publisher Copyright: © FEMS 2019. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com
id
4945c133-d78a-48d3-bb57-f55456320d60
date added to LUP
2022-08-26 11:37:36
date last changed
2024-03-05 21:47:31
@article{4945c133-d78a-48d3-bb57-f55456320d60,
  abstract     = {{<p>Most plants form symbiotic associations with arbuscular mycorrhizal fungi (AMF). AMF increase the uptake of plant nutrients by extending their extra-radical mycelium (ERM) in the soil where other groups of microorganisms may suppress the activity of the ERM. However, little is known about such suppression in natural soils. This work aimed to investigate the incidence of AMF suppression among soils sampled from highly variable natural ecosystems, and used <sup>33</sup>P uptake by the ERM to evaluate AMF activity. A second aim was to identify factors behind the observed AMF-suppression. We found that AMF-suppressiveness varied markedly among natural soils and occurred more frequently in low pH than in high pH soils. A previous study for cultivated soils revealed a strong biological component of suppressiveness against AMF, and in accordance we found that the composition of both fungal and bacterial communities differed significantly between AMF-suppressive and non-suppressive natural soils. Acidobacteria, Acidothermus, Xanthomonadaceae, Archaeorhizomyces sp., Mortierella humilis and some Mycena spp. were significantly more abundant in AMF-suppressive soils and may therefore be direct antagonists of AMF. This implies that the functioning of AMF in natural ecosystems is strongly modulated by specific soil microbes.</p>}},
  author       = {{Cruz-Paredes, Carla and Svenningsen, Nanna Bygvraa and Nybroe, Ole and Kjøller, Rasmus and Frøslev, Tobias Guldberg and Jakobsen, Iver}},
  issn         = {{0168-6496}},
  keywords     = {{Arbuscular mycorrhizal fungi; Interactions; Microbiome; Natural ecosystems; Suppressive soil}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{3}},
  publisher    = {{Oxford University Press}},
  series       = {{FEMS Microbiology Ecology}},
  title        = {{Suppression of arbuscular mycorrhizal fungal activity in a diverse collection of non-cultivated soils}},
  url          = {{http://dx.doi.org/10.1093/femsec/fiz020}},
  doi          = {{10.1093/femsec/fiz020}},
  volume       = {{95}},
  year         = {{2019}},
}