Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands

Autores
Mollard, Federico Pedro Otto; Naeth, M. A.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
An untested theory states that C4 grass seeds could germinate under lower water potentials (Ψ) than C3 seeds. We used hydrotime modelling to study seed water relations of C4 and C3 Canadian prairies grasses to address both Ψ divergent sensitivities and germination strategies along a risk-spreading continuum of responses to limited water. C4 grasses were Bouteloua gracilis, Calamovilfa longifolia and Schizachyrium scoparium; C3 grasses were Bromus carinatus, Elymus trachycaulus, Festuca hallii and Koeleria macrantha. Hydrotime parameters were obtained after incubation of non-dormant seeds under different Ψ PEG 6000 solutions. A t-test between C3 and C4 grasses did not find statistical differences in population mean base Ψ (Ψb(50)). We found idiosyncratic responses of C4 grasses along the risk-spreading continuum. B. gracilis showed a risk-takers strategy of a species able to quickly germinate in a dry soil due to its low Ψb(50) and hydrotime (θH). The high Ψb(50) of S. scoparium indicates it follows the risk-averse strategy so it can only germinate in wet soils. C. longifolia showed an intermediate strategy: the lowest Ψb(50) yet the highest θH. K. macrantha which thrives in the driest habitats showed the highest Ψb(50) suggesting a risk-averse strategy for a C3 species. Other C3 species showed intermediate germination patterns in response to Ψ relative to C4 species. Our results indicate that grasses display germination sensitivities to Ψ across the risk-spreading continuum of responses. Then seed water relations may be poor predictors to explain C3-C4 grasses differential recruitment and distribution in the Canadian prairies.
Fil: Mollard, Federico Pedro Otto. University of Alberta; Canadá. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Biología Aplicada y Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Naeth, M. A.. University of Alberta; Canadá
Materia
C3 Grasses
C4 Grasses
Germination Ecology
Recruitment
Semi-Arid Grasslands
Soil Water Availability
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:11336/17451

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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslandsMollard, Federico Pedro OttoNaeth, M. A.C3 GrassesC4 GrassesGermination EcologyRecruitmentSemi-Arid GrasslandsSoil Water Availabilityhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1An untested theory states that C4 grass seeds could germinate under lower water potentials (Ψ) than C3 seeds. We used hydrotime modelling to study seed water relations of C4 and C3 Canadian prairies grasses to address both Ψ divergent sensitivities and germination strategies along a risk-spreading continuum of responses to limited water. C4 grasses were Bouteloua gracilis, Calamovilfa longifolia and Schizachyrium scoparium; C3 grasses were Bromus carinatus, Elymus trachycaulus, Festuca hallii and Koeleria macrantha. Hydrotime parameters were obtained after incubation of non-dormant seeds under different Ψ PEG 6000 solutions. A t-test between C3 and C4 grasses did not find statistical differences in population mean base Ψ (Ψb(50)). We found idiosyncratic responses of C4 grasses along the risk-spreading continuum. B. gracilis showed a risk-takers strategy of a species able to quickly germinate in a dry soil due to its low Ψb(50) and hydrotime (θH). The high Ψb(50) of S. scoparium indicates it follows the risk-averse strategy so it can only germinate in wet soils. C. longifolia showed an intermediate strategy: the lowest Ψb(50) yet the highest θH. K. macrantha which thrives in the driest habitats showed the highest Ψb(50) suggesting a risk-averse strategy for a C3 species. Other C3 species showed intermediate germination patterns in response to Ψ relative to C4 species. Our results indicate that grasses display germination sensitivities to Ψ across the risk-spreading continuum of responses. Then seed water relations may be poor predictors to explain C3-C4 grasses differential recruitment and distribution in the Canadian prairies.Fil: Mollard, Federico Pedro Otto. University of Alberta; Canadá. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Biología Aplicada y Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Naeth, M. A.. University of Alberta; CanadáWiley2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17451Mollard, Federico Pedro Otto; Naeth, M. A.; Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands; Wiley; Plant Biology; 17; 2; 3-2015; 583-5871435-8603enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/plb.12292info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/plb.12292/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:58:36Zoai:ri.conicet.gov.ar:11336/17451instacron: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 09:58:36.436CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
title Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
spellingShingle Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
Mollard, Federico Pedro Otto
C3 Grasses
C4 Grasses
Germination Ecology
Recruitment
Semi-Arid Grasslands
Soil Water Availability
title_short Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
title_full Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
title_fullStr Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
title_full_unstemmed Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
title_sort Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands
dc.creator.none.fl_str_mv Mollard, Federico Pedro Otto
Naeth, M. A.
author Mollard, Federico Pedro Otto
author_facet Mollard, Federico Pedro Otto
Naeth, M. A.
author_role author
author2 Naeth, M. A.
author2_role author
dc.subject.none.fl_str_mv C3 Grasses
C4 Grasses
Germination Ecology
Recruitment
Semi-Arid Grasslands
Soil Water Availability
topic C3 Grasses
C4 Grasses
Germination Ecology
Recruitment
Semi-Arid Grasslands
Soil Water Availability
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv An untested theory states that C4 grass seeds could germinate under lower water potentials (Ψ) than C3 seeds. We used hydrotime modelling to study seed water relations of C4 and C3 Canadian prairies grasses to address both Ψ divergent sensitivities and germination strategies along a risk-spreading continuum of responses to limited water. C4 grasses were Bouteloua gracilis, Calamovilfa longifolia and Schizachyrium scoparium; C3 grasses were Bromus carinatus, Elymus trachycaulus, Festuca hallii and Koeleria macrantha. Hydrotime parameters were obtained after incubation of non-dormant seeds under different Ψ PEG 6000 solutions. A t-test between C3 and C4 grasses did not find statistical differences in population mean base Ψ (Ψb(50)). We found idiosyncratic responses of C4 grasses along the risk-spreading continuum. B. gracilis showed a risk-takers strategy of a species able to quickly germinate in a dry soil due to its low Ψb(50) and hydrotime (θH). The high Ψb(50) of S. scoparium indicates it follows the risk-averse strategy so it can only germinate in wet soils. C. longifolia showed an intermediate strategy: the lowest Ψb(50) yet the highest θH. K. macrantha which thrives in the driest habitats showed the highest Ψb(50) suggesting a risk-averse strategy for a C3 species. Other C3 species showed intermediate germination patterns in response to Ψ relative to C4 species. Our results indicate that grasses display germination sensitivities to Ψ across the risk-spreading continuum of responses. Then seed water relations may be poor predictors to explain C3-C4 grasses differential recruitment and distribution in the Canadian prairies.
Fil: Mollard, Federico Pedro Otto. University of Alberta; Canadá. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Biología Aplicada y Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Naeth, M. A.. University of Alberta; Canadá
description An untested theory states that C4 grass seeds could germinate under lower water potentials (Ψ) than C3 seeds. We used hydrotime modelling to study seed water relations of C4 and C3 Canadian prairies grasses to address both Ψ divergent sensitivities and germination strategies along a risk-spreading continuum of responses to limited water. C4 grasses were Bouteloua gracilis, Calamovilfa longifolia and Schizachyrium scoparium; C3 grasses were Bromus carinatus, Elymus trachycaulus, Festuca hallii and Koeleria macrantha. Hydrotime parameters were obtained after incubation of non-dormant seeds under different Ψ PEG 6000 solutions. A t-test between C3 and C4 grasses did not find statistical differences in population mean base Ψ (Ψb(50)). We found idiosyncratic responses of C4 grasses along the risk-spreading continuum. B. gracilis showed a risk-takers strategy of a species able to quickly germinate in a dry soil due to its low Ψb(50) and hydrotime (θH). The high Ψb(50) of S. scoparium indicates it follows the risk-averse strategy so it can only germinate in wet soils. C. longifolia showed an intermediate strategy: the lowest Ψb(50) yet the highest θH. K. macrantha which thrives in the driest habitats showed the highest Ψb(50) suggesting a risk-averse strategy for a C3 species. Other C3 species showed intermediate germination patterns in response to Ψ relative to C4 species. Our results indicate that grasses display germination sensitivities to Ψ across the risk-spreading continuum of responses. Then seed water relations may be poor predictors to explain C3-C4 grasses differential recruitment and distribution in the Canadian prairies.
publishDate 2015
dc.date.none.fl_str_mv 2015-03
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/11336/17451
Mollard, Federico Pedro Otto; Naeth, M. A.; Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands; Wiley; Plant Biology; 17; 2; 3-2015; 583-587
1435-8603
url http://hdl.handle.net/11336/17451
identifier_str_mv Mollard, Federico Pedro Otto; Naeth, M. A.; Germination sensitivities to water potential among co-existing C3 and C4 grasses of cool semi-arid prairie grasslands; Wiley; Plant Biology; 17; 2; 3-2015; 583-587
1435-8603
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/plb.12292
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/plb.12292/abstract
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
publisher.none.fl_str_mv Wiley
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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