MycorrhizaeV1, Main, Corpus, bibRecord, 000E70

Arbuscular mycorrhizal fungi alter the competitive hierarchy among old-field plant species.

Identifieur interne : 000E70 ( Main/Corpus ); précédent : 000E69; suivant : 000E71

Arbuscular mycorrhizal fungi alter the competitive hierarchy among old-field plant species.

Auteurs : Sabina Stanescu ; Hafiz Maherali

Source :

Oecologia [ 1432-1939 ] ; 2017.

RBID : pubmed:27848080

English descriptors

KwdEn :
- Biomass (MeSH), Fungi (MeSH), Mycorrhizae (MeSH), Plant Roots (MeSH), Soil (MeSH), Soil Microbiology (MeSH).
MESH :
- chemical : Soil.
- Biomass, Fungi, Mycorrhizae, Plant Roots, Soil Microbiology.

Abstract

Inoculation with arbuscular mycorrhizal (AM) fungi is known to increase the species diversity of plant communities. One mechanism that can increase the likelihood of species co-existence, and thus species diversity, is a trade-off between competitive ability and the magnitude of plant growth response to AM fungal inoculation. By suppressing the growth of strong competitors while simultaneously enhancing the growth of weak competitors, this trade-off would cause the competitive hierarchy to be less pronounced in soil inoculated with AM fungi relative to non-inoculated conditions. To test whether such a trade-off exists, we quantified competitive abilities and mycorrhizal growth response (MGR) among 21 species that co-occur in old fields in southern Ontario. Competitive ability was determined by calculating competitive effect (CE), or the degree to which each species suppressed the biomass of a common phytometer species, Plantago lanceolata. Higher CE values represent stronger competitive ability. Old-field species varied in their ability to suppress the biomass of the phytometer and MGR was generally positive. There was a statistically significant negative correlation between CE in non-inoculated soil and MGR (r = -0.49, P = 0.02). In addition, variance in CE was 73% lower in soil inoculated with AM fungi compared to non-inoculated soil (P = 0.0023). These findings support the hypothesis that AM fungi weaken strong competitors while enhancing the performance of weak competitors. Because this trade-off compressed the competitive hierarchy among old-field species in soil inoculated with AM fungi, it may be a mechanism by which mycorrhizal fungi enhance species evenness and diversity.

DOI: 10.1007/s00442-016-3771-6
PubMed: 27848080

Links to Exploration step

pubmed:27848080

Le document en format XML

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<author><name sortKey="Stanescu, Sabina" sort="Stanescu, Sabina" uniqKey="Stanescu S" first="Sabina" last="Stanescu">Sabina Stanescu</name>
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<author><name sortKey="Maherali, Hafiz" sort="Maherali, Hafiz" uniqKey="Maherali H" first="Hafiz" last="Maherali">Hafiz Maherali</name>
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<front><div type="abstract" xml:lang="en">Inoculation with arbuscular mycorrhizal (AM) fungi is known to increase the species diversity of plant communities. One mechanism that can increase the likelihood of species co-existence, and thus species diversity, is a trade-off between competitive ability and the magnitude of plant growth response to AM fungal inoculation. By suppressing the growth of strong competitors while simultaneously enhancing the growth of weak competitors, this trade-off would cause the competitive hierarchy to be less pronounced in soil inoculated with AM fungi relative to non-inoculated conditions. To test whether such a trade-off exists, we quantified competitive abilities and mycorrhizal growth response (MGR) among 21 species that co-occur in old fields in southern Ontario. Competitive ability was determined by calculating competitive effect (CE), or the degree to which each species suppressed the biomass of a common phytometer species, Plantago lanceolata. Higher CE values represent stronger competitive ability. Old-field species varied in their ability to suppress the biomass of the phytometer and MGR was generally positive. There was a statistically significant negative correlation between CE in non-inoculated soil and MGR (r = -0.49, P = 0.02). In addition, variance in CE was 73% lower in soil inoculated with AM fungi compared to non-inoculated soil (P = 0.0023). These findings support the hypothesis that AM fungi weaken strong competitors while enhancing the performance of weak competitors. Because this trade-off compressed the competitive hierarchy among old-field species in soil inoculated with AM fungi, it may be a mechanism by which mycorrhizal fungi enhance species evenness and diversity.</div>
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<Abstract><AbstractText>Inoculation with arbuscular mycorrhizal (AM) fungi is known to increase the species diversity of plant communities. One mechanism that can increase the likelihood of species co-existence, and thus species diversity, is a trade-off between competitive ability and the magnitude of plant growth response to AM fungal inoculation. By suppressing the growth of strong competitors while simultaneously enhancing the growth of weak competitors, this trade-off would cause the competitive hierarchy to be less pronounced in soil inoculated with AM fungi relative to non-inoculated conditions. To test whether such a trade-off exists, we quantified competitive abilities and mycorrhizal growth response (MGR) among 21 species that co-occur in old fields in southern Ontario. Competitive ability was determined by calculating competitive effect (CE), or the degree to which each species suppressed the biomass of a common phytometer species, Plantago lanceolata. Higher CE values represent stronger competitive ability. Old-field species varied in their ability to suppress the biomass of the phytometer and MGR was generally positive. There was a statistically significant negative correlation between CE in non-inoculated soil and MGR (r = -0.49, P = 0.02). In addition, variance in CE was 73% lower in soil inoculated with AM fungi compared to non-inoculated soil (P = 0.0023). These findings support the hypothesis that AM fungi weaken strong competitors while enhancing the performance of weak competitors. Because this trade-off compressed the competitive hierarchy among old-field species in soil inoculated with AM fungi, it may be a mechanism by which mycorrhizal fungi enhance species evenness and diversity.</AbstractText>
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Arbuscular mycorrhizal fungi alter the competitive hierarchy among old-field plant species.

Arbuscular mycorrhizal fungi alter the competitive hierarchy among old-field plant species.

Source :

English descriptors

Abstract

Links to Exploration step

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Pour manipuler ce document sous Unix (Dilib)

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