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Suppression of the activity of arbuscular mycorrhizal fungi by the soil microbiota

Svenningsen, Nanna B. ; Watts-Williams, Stephanie J. ; Joner, Erik J. ; Battini, Fabio ; Efthymiou, Aikaterini ; Cruz-Paredes, Carla LU orcid ; Nybroe, Ole and Jakobsen, Iver (2018) In ISME Journal 12(5). p.1296-1307
Abstract

Arbuscular mycorrhizal fungi (AMF) colonise roots of most plants; their extra-radical mycelium (ERM) extends into the soil and acquires nutrients for the plant. The ERM coexists with soil microbial communities and it is unresolved whether these communities stimulate or suppress the ERM activity. This work studied the prevalence of suppressed ERM activity and identified main components behind the suppression. ERM activity was determined by quantifying ERM-mediated P uptake from radioisotope-labelled unsterile soil into plants, and compared to soil physicochemical characteristics and soil microbiome composition. ERM activity varied considerably and was greatly suppressed in 4 of 21 soils. Suppression was mitigated by soil pasteurisation... (More)

Arbuscular mycorrhizal fungi (AMF) colonise roots of most plants; their extra-radical mycelium (ERM) extends into the soil and acquires nutrients for the plant. The ERM coexists with soil microbial communities and it is unresolved whether these communities stimulate or suppress the ERM activity. This work studied the prevalence of suppressed ERM activity and identified main components behind the suppression. ERM activity was determined by quantifying ERM-mediated P uptake from radioisotope-labelled unsterile soil into plants, and compared to soil physicochemical characteristics and soil microbiome composition. ERM activity varied considerably and was greatly suppressed in 4 of 21 soils. Suppression was mitigated by soil pasteurisation and had a dominating biotic component. AMF-suppressive soils had high abundances of Acidobacteria, and other bacterial taxa being putative fungal antagonists. Suppression was also associated with low soil pH, but this effect was likely indirect, as the relative abundance of, e.g., Acidobacteria decreased after liming. Suppression could not be transferred by adding small amounts of suppressive soil to conducive soil, and thus appeared to involve the common action of several taxa. The presence of AMF antagonists resembles the phenomenon of disease-suppressive soils and implies that ecosystem services of AMF will depend strongly on the specific soil microbiome.

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author
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publishing date
type
Contribution to journal
publication status
published
in
ISME Journal
volume
12
issue
5
pages
1296 - 1307
publisher
Nature Publishing Group
external identifiers
  • pmid:29382946
  • scopus:85041212356
ISSN
1751-7362
DOI
10.1038/s41396-018-0059-3
language
English
LU publication?
no
additional info
Funding Information: Acknowledgements The authors are thankful to Mette Flodgaard, Lena A Byrgesen, Lene Vigh and Morten L Stephensen for skilful technical assistance and to Simon Mundus for providing access to a range of Scandinavian agricultural soils. Funding for this work was provided by the Novo Nordisk Foundation, grant NNF16OC0021576. Publisher Copyright: © 2018 The Author(s).
id
61d3e652-60e4-4b08-a22c-0ef6af32d1dd
date added to LUP
2022-08-26 11:37:54
date last changed
2024-06-27 08:58:12
@article{61d3e652-60e4-4b08-a22c-0ef6af32d1dd,
  abstract     = {{<p>Arbuscular mycorrhizal fungi (AMF) colonise roots of most plants; their extra-radical mycelium (ERM) extends into the soil and acquires nutrients for the plant. The ERM coexists with soil microbial communities and it is unresolved whether these communities stimulate or suppress the ERM activity. This work studied the prevalence of suppressed ERM activity and identified main components behind the suppression. ERM activity was determined by quantifying ERM-mediated P uptake from radioisotope-labelled unsterile soil into plants, and compared to soil physicochemical characteristics and soil microbiome composition. ERM activity varied considerably and was greatly suppressed in 4 of 21 soils. Suppression was mitigated by soil pasteurisation and had a dominating biotic component. AMF-suppressive soils had high abundances of Acidobacteria, and other bacterial taxa being putative fungal antagonists. Suppression was also associated with low soil pH, but this effect was likely indirect, as the relative abundance of, e.g., Acidobacteria decreased after liming. Suppression could not be transferred by adding small amounts of suppressive soil to conducive soil, and thus appeared to involve the common action of several taxa. The presence of AMF antagonists resembles the phenomenon of disease-suppressive soils and implies that ecosystem services of AMF will depend strongly on the specific soil microbiome.</p>}},
  author       = {{Svenningsen, Nanna B. and Watts-Williams, Stephanie J. and Joner, Erik J. and Battini, Fabio and Efthymiou, Aikaterini and Cruz-Paredes, Carla and Nybroe, Ole and Jakobsen, Iver}},
  issn         = {{1751-7362}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{5}},
  pages        = {{1296--1307}},
  publisher    = {{Nature Publishing Group}},
  series       = {{ISME Journal}},
  title        = {{Suppression of the activity of arbuscular mycorrhizal fungi by the soil microbiota}},
  url          = {{http://dx.doi.org/10.1038/s41396-018-0059-3}},
  doi          = {{10.1038/s41396-018-0059-3}},
  volume       = {{12}},
  year         = {{2018}},
}