Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations

Autores
Cavazos, Brittany R.; Bohner, Teresa F.; Donald, Marion L.; Sneck, Michelle E.; Shadow, Alan; Omacini, Marina; Rudgers, Jennifer A.; Miller, Tom E. X.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Beneficial inherited symbionts are expected to reach high prevalence in host populations, yet many are observed at intermediate prevalence. Theory predicts that a balance of fitness benefits and efficiency of vertical transmission may interact to stabilize intermediate prevalence. We established populations of grass hosts (Lolium multiflorum) that varied in prevalence of a heritable fungal endophyte (Epichloё occultans), allowing us to infer long-term equilibria by tracking change in prevalence over one generation. We manipulated an environmental stressor (elevated precipitation), which we hypothesized would reduce the fitness benefits of symbiosis, and altered the efficiency of vertical transmission by replacing endophyte-positive seeds with endophyte-free seeds. Endophytes and elevated precipitation both increased host fitness, but symbiont effects were not stronger in the drier treatment, suggesting that benefits of symbiosis were unrelated to drought tolerance. Reduced transmission suppressed the inferred equilibrium prevalence from 42.6% to 11.7%. However, elevated precipitation did not modify prevalence, consistent with the result that it did not modify fitness benefits. Our results demonstrate that failed transmission can influence the prevalence of heritable microbes and that intermediate prevalence can be a stable equilibrium due to forces that allow symbionts to increase (fitness benefits) but prevent them from reaching fixation (failed transmission).
Fil: Cavazos, Brittany R.. Rice University; Estados Unidos
Fil: Bohner, Teresa F.. Rice University; Estados Unidos
Fil: Donald, Marion L.. Rice University; Estados Unidos
Fil: Sneck, Michelle E.. Rice University; Estados Unidos
Fil: Shadow, Alan. United States Department of Agriculture; Estados Unidos
Fil: Omacini, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Rudgers, Jennifer A.. University of New Mexico; Estados Unidos
Fil: Miller, Tom E. X.. Rice University; Estados Unidos
Materia
DEMOGRAPHY
Epichloё
FUNGAL ENDOPHYTE
LOLIUM MULTIFLORUM
MUTUALISM
SYMBIOSIS
VERTICAL TRANSMISSION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/93601
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/93601
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populationsCavazos, Brittany R.Bohner, Teresa F.Donald, Marion L.Sneck, Michelle E.Shadow, AlanOmacini, MarinaRudgers, Jennifer A.Miller, Tom E. X.DEMOGRAPHYEpichloёFUNGAL ENDOPHYTELOLIUM MULTIFLORUMMUTUALISMSYMBIOSISVERTICAL TRANSMISSIONhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Beneficial inherited symbionts are expected to reach high prevalence in host populations, yet many are observed at intermediate prevalence. Theory predicts that a balance of fitness benefits and efficiency of vertical transmission may interact to stabilize intermediate prevalence. We established populations of grass hosts (Lolium multiflorum) that varied in prevalence of a heritable fungal endophyte (Epichloё occultans), allowing us to infer long-term equilibria by tracking change in prevalence over one generation. We manipulated an environmental stressor (elevated precipitation), which we hypothesized would reduce the fitness benefits of symbiosis, and altered the efficiency of vertical transmission by replacing endophyte-positive seeds with endophyte-free seeds. Endophytes and elevated precipitation both increased host fitness, but symbiont effects were not stronger in the drier treatment, suggesting that benefits of symbiosis were unrelated to drought tolerance. Reduced transmission suppressed the inferred equilibrium prevalence from 42.6% to 11.7%. However, elevated precipitation did not modify prevalence, consistent with the result that it did not modify fitness benefits. Our results demonstrate that failed transmission can influence the prevalence of heritable microbes and that intermediate prevalence can be a stable equilibrium due to forces that allow symbionts to increase (fitness benefits) but prevent them from reaching fixation (failed transmission).Fil: Cavazos, Brittany R.. Rice University; Estados UnidosFil: Bohner, Teresa F.. Rice University; Estados UnidosFil: Donald, Marion L.. Rice University; Estados UnidosFil: Sneck, Michelle E.. Rice University; Estados UnidosFil: Shadow, Alan. United States Department of Agriculture; Estados UnidosFil: Omacini, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; ArgentinaFil: Rudgers, Jennifer A.. University of New Mexico; Estados UnidosFil: Miller, Tom E. X.. Rice University; Estados UnidosWiley Blackwell Publishing, Inc2018-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/93601Cavazos, Brittany R.; Bohner, Teresa F.; Donald, Marion L.; Sneck, Michelle E.; Shadow, Alan; et al.; Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations; Wiley Blackwell Publishing, Inc; New Phytologist; 219; 3; 8-2018; 1075-10840028-646XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/nph.15215info:eu-repo/semantics/altIdentifier/url/https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.15215info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:17:24Zoai:ri.conicet.gov.ar:11336/93601instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:17:25.068CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
title Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
spellingShingle Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
Cavazos, Brittany R.
DEMOGRAPHY
Epichloё
FUNGAL ENDOPHYTE
LOLIUM MULTIFLORUM
MUTUALISM
SYMBIOSIS
VERTICAL TRANSMISSION
title_short Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
title_full Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
title_fullStr Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
title_full_unstemmed Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
title_sort Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations
dc.creator.none.fl_str_mv Cavazos, Brittany R.
Bohner, Teresa F.
Donald, Marion L.
Sneck, Michelle E.
Shadow, Alan
Omacini, Marina
Rudgers, Jennifer A.
Miller, Tom E. X.
author Cavazos, Brittany R.
author_facet Cavazos, Brittany R.
Bohner, Teresa F.
Donald, Marion L.
Sneck, Michelle E.
Shadow, Alan
Omacini, Marina
Rudgers, Jennifer A.
Miller, Tom E. X.
author_role author
author2 Bohner, Teresa F.
Donald, Marion L.
Sneck, Michelle E.
Shadow, Alan
Omacini, Marina
Rudgers, Jennifer A.
Miller, Tom E. X.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv DEMOGRAPHY
Epichloё
FUNGAL ENDOPHYTE
LOLIUM MULTIFLORUM
MUTUALISM
SYMBIOSIS
VERTICAL TRANSMISSION
topic DEMOGRAPHY
Epichloё
FUNGAL ENDOPHYTE
LOLIUM MULTIFLORUM
MUTUALISM
SYMBIOSIS
VERTICAL TRANSMISSION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Beneficial inherited symbionts are expected to reach high prevalence in host populations, yet many are observed at intermediate prevalence. Theory predicts that a balance of fitness benefits and efficiency of vertical transmission may interact to stabilize intermediate prevalence. We established populations of grass hosts (Lolium multiflorum) that varied in prevalence of a heritable fungal endophyte (Epichloё occultans), allowing us to infer long-term equilibria by tracking change in prevalence over one generation. We manipulated an environmental stressor (elevated precipitation), which we hypothesized would reduce the fitness benefits of symbiosis, and altered the efficiency of vertical transmission by replacing endophyte-positive seeds with endophyte-free seeds. Endophytes and elevated precipitation both increased host fitness, but symbiont effects were not stronger in the drier treatment, suggesting that benefits of symbiosis were unrelated to drought tolerance. Reduced transmission suppressed the inferred equilibrium prevalence from 42.6% to 11.7%. However, elevated precipitation did not modify prevalence, consistent with the result that it did not modify fitness benefits. Our results demonstrate that failed transmission can influence the prevalence of heritable microbes and that intermediate prevalence can be a stable equilibrium due to forces that allow symbionts to increase (fitness benefits) but prevent them from reaching fixation (failed transmission).
Fil: Cavazos, Brittany R.. Rice University; Estados Unidos
Fil: Bohner, Teresa F.. Rice University; Estados Unidos
Fil: Donald, Marion L.. Rice University; Estados Unidos
Fil: Sneck, Michelle E.. Rice University; Estados Unidos
Fil: Shadow, Alan. United States Department of Agriculture; Estados Unidos
Fil: Omacini, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Rudgers, Jennifer A.. University of New Mexico; Estados Unidos
Fil: Miller, Tom E. X.. Rice University; Estados Unidos
description Beneficial inherited symbionts are expected to reach high prevalence in host populations, yet many are observed at intermediate prevalence. Theory predicts that a balance of fitness benefits and efficiency of vertical transmission may interact to stabilize intermediate prevalence. We established populations of grass hosts (Lolium multiflorum) that varied in prevalence of a heritable fungal endophyte (Epichloё occultans), allowing us to infer long-term equilibria by tracking change in prevalence over one generation. We manipulated an environmental stressor (elevated precipitation), which we hypothesized would reduce the fitness benefits of symbiosis, and altered the efficiency of vertical transmission by replacing endophyte-positive seeds with endophyte-free seeds. Endophytes and elevated precipitation both increased host fitness, but symbiont effects were not stronger in the drier treatment, suggesting that benefits of symbiosis were unrelated to drought tolerance. Reduced transmission suppressed the inferred equilibrium prevalence from 42.6% to 11.7%. However, elevated precipitation did not modify prevalence, consistent with the result that it did not modify fitness benefits. Our results demonstrate that failed transmission can influence the prevalence of heritable microbes and that intermediate prevalence can be a stable equilibrium due to forces that allow symbionts to increase (fitness benefits) but prevent them from reaching fixation (failed transmission).
publishDate 2018
dc.date.none.fl_str_mv 2018-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/93601
Cavazos, Brittany R.; Bohner, Teresa F.; Donald, Marion L.; Sneck, Michelle E.; Shadow, Alan; et al.; Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations; Wiley Blackwell Publishing, Inc; New Phytologist; 219; 3; 8-2018; 1075-1084
0028-646X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/93601
identifier_str_mv Cavazos, Brittany R.; Bohner, Teresa F.; Donald, Marion L.; Sneck, Michelle E.; Shadow, Alan; et al.; Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations; Wiley Blackwell Publishing, Inc; New Phytologist; 219; 3; 8-2018; 1075-1084
0028-646X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/nph.15215
info:eu-repo/semantics/altIdentifier/url/https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.15215
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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