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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/17451
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oai:ri.conicet.gov.ar:11336/17451 |
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network_name_str |
CONICET Digital (CONICET) |
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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 |
_version_ |
1844613745584635904 |
score |
13.070432 |