Suppression of arbuscular mycorrhizal fungal activity in a diverse collection of non-cultivated soils
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Suppression of arbuscular mycorrhizal fungal activity in a diverse collection of non-cultivated soils. / Cruz Paredes, Carla; Svenningsen, Nanna Bygvraa; Nybroe, Ole; Kjøller, Rasmus; Frøslev, Tobias Guldberg; Jakobsen, Iver.
In: FEMS Microbiology Ecology, Vol. 95, No. 3, fiz020, 03.2019, p. 1-10.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Suppression of arbuscular mycorrhizal fungal activity in a diverse collection of non-cultivated soils
AU - Cruz Paredes, Carla
AU - Svenningsen, Nanna Bygvraa
AU - Nybroe, Ole
AU - Kjøller, Rasmus
AU - Frøslev, Tobias Guldberg
AU - Jakobsen, Iver
PY - 2019/3
Y1 - 2019/3
N2 - 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 33 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.
AB - 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 33 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.
KW - Arbuscular mycorrhizal fungi
KW - Interactions
KW - Microbiome
KW - Natural ecosystems
KW - Suppressive soil
U2 - 10.1093/femsec/fiz020
DO - 10.1093/femsec/fiz020
M3 - Journal article
C2 - 30715290
AN - SCOPUS:85063905185
VL - 95
SP - 1
EP - 10
JO - F E M S Microbiology Ecology
JF - F E M S Microbiology Ecology
SN - 0168-6496
IS - 3
M1 - fiz020
ER -
ID: 217994456