Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa

Autores
Caetano Anollés, Gustavo; Favelukes, Gabriel
Año de publicación
1986
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Early (4 h) adsorption of Rhizobium melioti L5-30 in low numbers to alfalfa roots in mineral solution was examined for competition with other bacterial strains. All tested competitor strains decreased the adsorption of L5-30 by extents which depended on the strain and its concentration. The decrease of adsorption by R. meliloti competitors (all of them infective in alfalfa) was nearly complete at saturation (97 to 99% decrease). AU other heterologous rhizobia and Agrobacterium tumefaciens at saturating concentrations (106 to 107 per ml) decreased adsorption of L5-30 only partially, less than 60%. The differential effects of homologous and heterologous competitors indicate that initial adsorption of R. meliloti to the root surface of its host occurs in symbiont-specific as well as nonspecific modes and suggest the existence of binding sites on roots which are highly selective for the specific microsymbiont in the presence of other heterologous bacteria even in very unfavorable (less than 10-4) symbiont-competitor concentration ratios.
Facultad de Ciencias Exactas
Materia
Química
Simbiosis
Rhizobium
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/106623
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/106623
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of AlfalfaCaetano Anollés, GustavoFavelukes, GabrielQuímicaSimbiosisRhizobiumEarly (4 h) adsorption of Rhizobium melioti L5-30 in low numbers to alfalfa roots in mineral solution was examined for competition with other bacterial strains. All tested competitor strains decreased the adsorption of L5-30 by extents which depended on the strain and its concentration. The decrease of adsorption by R. meliloti competitors (all of them infective in alfalfa) was nearly complete at saturation (97 to 99% decrease). AU other heterologous rhizobia and Agrobacterium tumefaciens at saturating concentrations (106 to 107 per ml) decreased adsorption of L5-30 only partially, less than 60%. The differential effects of homologous and heterologous competitors indicate that initial adsorption of R. meliloti to the root surface of its host occurs in symbiont-specific as well as nonspecific modes and suggest the existence of binding sites on roots which are highly selective for the specific microsymbiont in the presence of other heterologous bacteria even in very unfavorable (less than 10-4) symbiont-competitor concentration ratios.Facultad de Ciencias Exactas1986info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/106623enginfo:eu-repo/semantics/altIdentifier/url/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC203533&blobtype=pdfinfo:eu-repo/semantics/altIdentifier/issn/0099-2240info:eu-repo/semantics/altIdentifier/pmid/16347138info:eu-repo/semantics/altIdentifier/doi/10.1128/aem.52.2.377-382.1986info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:23:56Zoai:sedici.unlp.edu.ar:10915/106623Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:23:57.006SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
title Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
spellingShingle Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
Caetano Anollés, Gustavo
Química
Simbiosis
Rhizobium
title_short Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
title_full Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
title_fullStr Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
title_full_unstemmed Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
title_sort Host-Symbiont Specificity Expressed during Early Adsorption of <i>Rhizobium meliloti</i> to the Root Surface of Alfalfa
dc.creator.none.fl_str_mv Caetano Anollés, Gustavo
Favelukes, Gabriel
author Caetano Anollés, Gustavo
author_facet Caetano Anollés, Gustavo
Favelukes, Gabriel
author_role author
author2 Favelukes, Gabriel
author2_role author
dc.subject.none.fl_str_mv Química
Simbiosis
Rhizobium
topic Química
Simbiosis
Rhizobium
dc.description.none.fl_txt_mv Early (4 h) adsorption of Rhizobium melioti L5-30 in low numbers to alfalfa roots in mineral solution was examined for competition with other bacterial strains. All tested competitor strains decreased the adsorption of L5-30 by extents which depended on the strain and its concentration. The decrease of adsorption by R. meliloti competitors (all of them infective in alfalfa) was nearly complete at saturation (97 to 99% decrease). AU other heterologous rhizobia and Agrobacterium tumefaciens at saturating concentrations (106 to 107 per ml) decreased adsorption of L5-30 only partially, less than 60%. The differential effects of homologous and heterologous competitors indicate that initial adsorption of R. meliloti to the root surface of its host occurs in symbiont-specific as well as nonspecific modes and suggest the existence of binding sites on roots which are highly selective for the specific microsymbiont in the presence of other heterologous bacteria even in very unfavorable (less than 10-4) symbiont-competitor concentration ratios.
Facultad de Ciencias Exactas
description Early (4 h) adsorption of Rhizobium melioti L5-30 in low numbers to alfalfa roots in mineral solution was examined for competition with other bacterial strains. All tested competitor strains decreased the adsorption of L5-30 by extents which depended on the strain and its concentration. The decrease of adsorption by R. meliloti competitors (all of them infective in alfalfa) was nearly complete at saturation (97 to 99% decrease). AU other heterologous rhizobia and Agrobacterium tumefaciens at saturating concentrations (106 to 107 per ml) decreased adsorption of L5-30 only partially, less than 60%. The differential effects of homologous and heterologous competitors indicate that initial adsorption of R. meliloti to the root surface of its host occurs in symbiont-specific as well as nonspecific modes and suggest the existence of binding sites on roots which are highly selective for the specific microsymbiont in the presence of other heterologous bacteria even in very unfavorable (less than 10-4) symbiont-competitor concentration ratios.
publishDate 1986
dc.date.none.fl_str_mv 1986
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/106623
url http://sedici.unlp.edu.ar/handle/10915/106623
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC203533&blobtype=pdf
info:eu-repo/semantics/altIdentifier/issn/0099-2240
info:eu-repo/semantics/altIdentifier/pmid/16347138
info:eu-repo/semantics/altIdentifier/doi/10.1128/aem.52.2.377-382.1986
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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