Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.

ABSTRACT.- Purpose: Silicon (Si) accumulation by grasses alleviates diverse biotic and abiotic stresses. Despite this important functional role, we have limited understanding of how root microbial symbionts, such as arbuscular mycorrhizal (AM) fungi, affect Si uptake and even less about how Si suppl...

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Detalhes bibliográficos
Autores: JOHNSON, S.N., POWELL, J.R., FREW, A., CIBILS-STEWART, X.
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2022
País:Uruguay
Recursos:Instituto Nacional de Investigación Agropecuaria
Repositório:AINFO
Idioma:inglês
OAI Identifier:oai:redi.anii.org.uy:20.500.12381/4260
Acesso em linha:https://ainfo.inia.uy/consulta/busca?b=pc&id=63811&biblioteca=vazio&busca=63811&qFacets=63811
Access Level:Acceso aberto
Palavra-chave:Arbuscular mycorrhizal fungi
Roots
Silica
Silicification
Soils
Symbiont
Trade-offs
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spelling 2025-06-23T18:25:38Z2025-06-23T18:25:38Z20222025-06-23T18:25:38Zhttps://ainfo.inia.uy/consulta/busca?b=pc&id=63811&biblioteca=vazio&busca=63811&qFacets=63811ABSTRACT.- Purpose: Silicon (Si) accumulation by grasses alleviates diverse biotic and abiotic stresses. Despite this important functional role, we have limited understanding of how root microbial symbionts, such as arbuscular mycorrhizal (AM) fungi, affect Si uptake and even less about how Si supply and accumulation affect AM fungal colonisation. Our objective was to determine the nature of this two-way interaction in the model grass, Brachypodium distachyon. Methods: We grew B. distachyon with five levels of Si supplementation using wild-type plants and a mutant (Bdlsi1-1) that has little capacity for Si uptake. Half of the plants were colonised by AM fungi; half were free of AM fungi. We measured Si accumulation, AM fungal colonisation, leaf carbon (C), nitrogen (N) and phosphorus (P) concentrations. Results: AM fungi did not affect Si accumulation, although small increases occurred when root mass was included as a covariate. Si supplemented soil promoted plant growth and P uptake. Si accumulation suppressed colonisation by AM fungi and C concentrations in wild type but not in Bdlsi1-1 plants. Si concentrations were negatively correlated with C and N concentrations, with correlations being stronger in wild-type plants than Bdlsi1-1 plants. Conclusions: Our results indicate that Si accumulation in the plant, rather than Si availability in the soil, underpinned reduced AMF colonisation. We propose that Si accumulation is unlikely to be impacted by AM fungi in plants with inherently high Si accumulation, but Si accumulation may suppress AM fungal colonisation in such plants. © 2022, The Author(s).https://hdl.handle.net/20.500.12381/4260enenginfo:eu-repo/semantics/openAccessAcceso abiertoArbuscular mycorrhizal fungiRootsSilicaSilicificationSoilsSymbiontTrade-offsSilicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.ArticlePublishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:AINFOinstname:Instituto Nacional de Investigación Agropecuariainstacron:Instituto Nacional de Investigación AgropecuariaJOHNSON, S.N.POWELL, J.R.FREW, A.CIBILS-STEWART, X.SWORDsword-2025-06-23T15:25:38.original.xmlOriginal SWORD entry documentapplication/octet-stream2849https://redi.anii.org.uy/jspui/bitstream/20.500.12381/4260/1/sword-2025-06-23T15%3a25%3a38.original.xmlbf7623a5c7d6733b452c2d26fbac63c0MD5120.500.12381/42602026-02-10 15:53:56.55oai:redi.anii.org.uy:20.500.12381/4260Institucionalhttps://ainfo.inia.uy/Organismo científico-tecnológicohttp://inia.uyhttps://redi.anii.org.uy/oai/requestlorrego@inia.org.uyUruguayopendoar:2026-02-10T18:53:56AINFO - Instituto Nacional de Investigación Agropecuariafalse
dc.title.none.fl_str_mv Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
title Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
spellingShingle Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
JOHNSON, S.N.
Arbuscular mycorrhizal fungi
Roots
Silica
Silicification
Soils
Symbiont
Trade-offs
title_short Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
title_full Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
title_fullStr Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
title_full_unstemmed Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
title_sort Silicon accumulation suppresses arbuscular mycorrhizal fungal colonisation in the model grass Brachypodium distachyon.
dc.creator.none.fl_str_mv JOHNSON, S.N.
POWELL, J.R.
FREW, A.
CIBILS-STEWART, X.
author JOHNSON, S.N.
author_facet JOHNSON, S.N.
POWELL, J.R.
FREW, A.
CIBILS-STEWART, X.
author_role author
author2 POWELL, J.R.
FREW, A.
CIBILS-STEWART, X.
author2_role author
author
author
dc.subject.none.fl_str_mv Arbuscular mycorrhizal fungi
Roots
Silica
Silicification
Soils
Symbiont
Trade-offs
topic Arbuscular mycorrhizal fungi
Roots
Silica
Silicification
Soils
Symbiont
Trade-offs
description ABSTRACT.- Purpose: Silicon (Si) accumulation by grasses alleviates diverse biotic and abiotic stresses. Despite this important functional role, we have limited understanding of how root microbial symbionts, such as arbuscular mycorrhizal (AM) fungi, affect Si uptake and even less about how Si supply and accumulation affect AM fungal colonisation. Our objective was to determine the nature of this two-way interaction in the model grass, Brachypodium distachyon. Methods: We grew B. distachyon with five levels of Si supplementation using wild-type plants and a mutant (Bdlsi1-1) that has little capacity for Si uptake. Half of the plants were colonised by AM fungi; half were free of AM fungi. We measured Si accumulation, AM fungal colonisation, leaf carbon (C), nitrogen (N) and phosphorus (P) concentrations. Results: AM fungi did not affect Si accumulation, although small increases occurred when root mass was included as a covariate. Si supplemented soil promoted plant growth and P uptake. Si accumulation suppressed colonisation by AM fungi and C concentrations in wild type but not in Bdlsi1-1 plants. Si concentrations were negatively correlated with C and N concentrations, with correlations being stronger in wild-type plants than Bdlsi1-1 plants. Conclusions: Our results indicate that Si accumulation in the plant, rather than Si availability in the soil, underpinned reduced AMF colonisation. We propose that Si accumulation is unlikely to be impacted by AM fungi in plants with inherently high Si accumulation, but Si accumulation may suppress AM fungal colonisation in such plants. © 2022, The Author(s).
publishDate 2022
dc.date.issued.none.fl_str_mv 2022
dc.date.accessioned.none.fl_str_mv 2025-06-23T18:25:38Z
dc.date.available.none.fl_str_mv 2025-06-23T18:25:38Z
dc.date.updated.none.fl_str_mv 2025-06-23T18:25:38Z
dc.type.none.fl_str_mv Article
PublishedVersion
info:eu-repo/semantics/article
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status_str publishedVersion
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dc.language.iso.none.fl_str_mv en
eng
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language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
dc.rights.es.fl_str_mv Acceso abierto
eu_rights_str_mv openAccess
rights_invalid_str_mv Acceso abierto
dc.source.none.fl_str_mv reponame:AINFO
instname:Instituto Nacional de Investigación Agropecuaria
instacron:Instituto Nacional de Investigación Agropecuaria
instname_str Instituto Nacional de Investigación Agropecuaria
instacron_str Instituto Nacional de Investigación Agropecuaria
institution Instituto Nacional de Investigación Agropecuaria
reponame_str AINFO
collection AINFO
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