Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation

Autores
Flemmer, Andrea Cecilia; Busso, Carlos Alberto; Fernandez, Osvaldo Alberto; Montani, Tomás
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effects ofearly and late defoliations were evaluated under different levels of soil water content on root growth, appearance and disappear-ance in Stipa claraziiBall, S. tenuisPhil., and S. gynerioidesPhil. Field studies were conducted in 1995, 1996 and early 1997. Stipa clarazii and S. tenuisare two important palatable perennial tussock grasses in temperate, semiarid rangelands of centralArgentina, where S. gynerioidesis one of the most abundant, unpalatable perennial grass species. We hypothesized that (1) rootgrowth is reduced after defoliation at any phenological stage in S. claraziiand S. tenuisin comparison to undefoliated controls, (2) root growth, and root appearance and disappearance in all three species decrease as plant water stress increases, and (3) rootgrowth associated with water stress in S. claraziiand S. tenuisis reduced comparatively less when plants are water-stressed earli-er than later, or for a longer period of time during the growing season. Our results led us to reject hypothesis 1 and accept hypothe-ses 2 and 3. Maintenance of root growth after defoliation in S. claraziiand S. tenuiswould allow these species a greater soilexploration and resource finding to sustain regrowth in their native, semiarid environments.
Les auteursont évalué les effets d’une défoliation rapide ou tardive sur la croissance, la naissance et la mort des racines chez Stipa claraziiBall, S. tenuisPhil. et S. gynerioidesPhil. à diverses teneurs en eau du sol. Les études sur le terrain ont eu lieu en 1995, 1996 etau début de 1997. Stipa claraziiet S. tenuissont deux importantes graminées vivaces comestibles poussant sur les buttes de gazondans les grands parcours semi-arides du centre de l’Argentine, où S. gynerioidesdemeure l’une des plus abondantes graminéesvivaces impropres à la consommation pour le bétail. Les auteurs ont formulé diverses hypothèses : 1) que les racines de S. claraziiet S. tenuiscroissent plus lentement après la défoliation, peu importe le stade phénologique, comparativement aux plants témoinsnon défoliés; 2) que la croissance, la naissance et la mort des racines diminuent à mesure que le stress hydrique s’aggrave chez lestrois espèces; 3) que le ralentissement de la croissance des racines associé au stress hydrique chez S. claraziiet S. tenuisest moinsgrand quand le stress survient au début de la période végétative que quand il survient plus tard ou se prolonge. Les résultats ontamené les auteurs à rejeter la première hypothèse et à retenir les deux autres. En poursuivant leur croissance après la défoliation,les racines de S. claraziiet de S. tenuispermettraient aux deux espèces d’explorer le sol davantage et de découvrir d’autresressources qui les aideront à survivre dans leur milieu naturel, semi-aride.
Fil: Flemmer, Andrea Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Busso, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Fernandez, Osvaldo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Montani, Tomás. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Materia
Root Growth
Stipa Species
Appearance And Disappearance
Perennial Grasses
Water Stress
Defoliation
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:11336/32810
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliationCroissance, naissance et mort des racines chez les gram-inées vivaces : incidence du stress hydrique dans le temps, avec ou sans défoliationFlemmer, Andrea CeciliaBusso, Carlos AlbertoFernandez, Osvaldo AlbertoMontani, TomásRoot GrowthStipa SpeciesAppearance And DisappearancePerennial GrassesWater StressDefoliationhttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4The effects ofearly and late defoliations were evaluated under different levels of soil water content on root growth, appearance and disappear-ance in Stipa claraziiBall, S. tenuisPhil., and S. gynerioidesPhil. Field studies were conducted in 1995, 1996 and early 1997. Stipa clarazii and S. tenuisare two important palatable perennial tussock grasses in temperate, semiarid rangelands of centralArgentina, where S. gynerioidesis one of the most abundant, unpalatable perennial grass species. We hypothesized that (1) rootgrowth is reduced after defoliation at any phenological stage in S. claraziiand S. tenuisin comparison to undefoliated controls, (2) root growth, and root appearance and disappearance in all three species decrease as plant water stress increases, and (3) rootgrowth associated with water stress in S. claraziiand S. tenuisis reduced comparatively less when plants are water-stressed earli-er than later, or for a longer period of time during the growing season. Our results led us to reject hypothesis 1 and accept hypothe-ses 2 and 3. Maintenance of root growth after defoliation in S. claraziiand S. tenuiswould allow these species a greater soilexploration and resource finding to sustain regrowth in their native, semiarid environments.Les auteursont évalué les effets d’une défoliation rapide ou tardive sur la croissance, la naissance et la mort des racines chez Stipa claraziiBall, S. tenuisPhil. et S. gynerioidesPhil. à diverses teneurs en eau du sol. Les études sur le terrain ont eu lieu en 1995, 1996 etau début de 1997. Stipa claraziiet S. tenuissont deux importantes graminées vivaces comestibles poussant sur les buttes de gazondans les grands parcours semi-arides du centre de l’Argentine, où S. gynerioidesdemeure l’une des plus abondantes graminéesvivaces impropres à la consommation pour le bétail. Les auteurs ont formulé diverses hypothèses : 1) que les racines de S. claraziiet S. tenuiscroissent plus lentement après la défoliation, peu importe le stade phénologique, comparativement aux plants témoinsnon défoliés; 2) que la croissance, la naissance et la mort des racines diminuent à mesure que le stress hydrique s’aggrave chez lestrois espèces; 3) que le ralentissement de la croissance des racines associé au stress hydrique chez S. claraziiet S. tenuisest moinsgrand quand le stress survient au début de la période végétative que quand il survient plus tard ou se prolonge. Les résultats ontamené les auteurs à rejeter la première hypothèse et à retenir les deux autres. En poursuivant leur croissance après la défoliation,les racines de S. claraziiet de S. tenuispermettraient aux deux espèces d’explorer le sol davantage et de découvrir d’autresressources qui les aideront à survivre dans leur milieu naturel, semi-aride.Fil: Flemmer, Andrea Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Busso, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Fernandez, Osvaldo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Montani, Tomás. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaAgricultural Inst Canada2002-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32810Busso, Carlos Alberto; Montani, Tomás; Fernandez, Osvaldo Alberto; Flemmer, Andrea Cecilia; Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation; Agricultural Inst Canada; Canadian Journal Of Plant Science; 82; 3; 12-2002; 539-5470008-4220CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.4141/P00-189info:eu-repo/semantics/altIdentifier/url/http://www.nrcresearchpress.com/doi/abs/10.4141/P00-189#.WlZFGK7ibIXinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:43:14Zoai:ri.conicet.gov.ar:11336/32810instacron: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:34982025-10-15 14:43:14.604CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
Croissance, naissance et mort des racines chez les gram-inées vivaces : incidence du stress hydrique dans le temps, avec ou sans défoliation
title Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
spellingShingle Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
Flemmer, Andrea Cecilia
Root Growth
Stipa Species
Appearance And Disappearance
Perennial Grasses
Water Stress
Defoliation
title_short Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
title_full Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
title_fullStr Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
title_full_unstemmed Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
title_sort Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation
dc.creator.none.fl_str_mv Flemmer, Andrea Cecilia
Busso, Carlos Alberto
Fernandez, Osvaldo Alberto
Montani, Tomás
author Flemmer, Andrea Cecilia
author_facet Flemmer, Andrea Cecilia
Busso, Carlos Alberto
Fernandez, Osvaldo Alberto
Montani, Tomás
author_role author
author2 Busso, Carlos Alberto
Fernandez, Osvaldo Alberto
Montani, Tomás
author2_role author
author
author
dc.subject.none.fl_str_mv Root Growth
Stipa Species
Appearance And Disappearance
Perennial Grasses
Water Stress
Defoliation
topic Root Growth
Stipa Species
Appearance And Disappearance
Perennial Grasses
Water Stress
Defoliation
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv The effects ofearly and late defoliations were evaluated under different levels of soil water content on root growth, appearance and disappear-ance in Stipa claraziiBall, S. tenuisPhil., and S. gynerioidesPhil. Field studies were conducted in 1995, 1996 and early 1997. Stipa clarazii and S. tenuisare two important palatable perennial tussock grasses in temperate, semiarid rangelands of centralArgentina, where S. gynerioidesis one of the most abundant, unpalatable perennial grass species. We hypothesized that (1) rootgrowth is reduced after defoliation at any phenological stage in S. claraziiand S. tenuisin comparison to undefoliated controls, (2) root growth, and root appearance and disappearance in all three species decrease as plant water stress increases, and (3) rootgrowth associated with water stress in S. claraziiand S. tenuisis reduced comparatively less when plants are water-stressed earli-er than later, or for a longer period of time during the growing season. Our results led us to reject hypothesis 1 and accept hypothe-ses 2 and 3. Maintenance of root growth after defoliation in S. claraziiand S. tenuiswould allow these species a greater soilexploration and resource finding to sustain regrowth in their native, semiarid environments.
Les auteursont évalué les effets d’une défoliation rapide ou tardive sur la croissance, la naissance et la mort des racines chez Stipa claraziiBall, S. tenuisPhil. et S. gynerioidesPhil. à diverses teneurs en eau du sol. Les études sur le terrain ont eu lieu en 1995, 1996 etau début de 1997. Stipa claraziiet S. tenuissont deux importantes graminées vivaces comestibles poussant sur les buttes de gazondans les grands parcours semi-arides du centre de l’Argentine, où S. gynerioidesdemeure l’une des plus abondantes graminéesvivaces impropres à la consommation pour le bétail. Les auteurs ont formulé diverses hypothèses : 1) que les racines de S. claraziiet S. tenuiscroissent plus lentement après la défoliation, peu importe le stade phénologique, comparativement aux plants témoinsnon défoliés; 2) que la croissance, la naissance et la mort des racines diminuent à mesure que le stress hydrique s’aggrave chez lestrois espèces; 3) que le ralentissement de la croissance des racines associé au stress hydrique chez S. claraziiet S. tenuisest moinsgrand quand le stress survient au début de la période végétative que quand il survient plus tard ou se prolonge. Les résultats ontamené les auteurs à rejeter la première hypothèse et à retenir les deux autres. En poursuivant leur croissance après la défoliation,les racines de S. claraziiet de S. tenuispermettraient aux deux espèces d’explorer le sol davantage et de découvrir d’autresressources qui les aideront à survivre dans leur milieu naturel, semi-aride.
Fil: Flemmer, Andrea Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Busso, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Fernandez, Osvaldo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Montani, Tomás. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
description The effects ofearly and late defoliations were evaluated under different levels of soil water content on root growth, appearance and disappear-ance in Stipa claraziiBall, S. tenuisPhil., and S. gynerioidesPhil. Field studies were conducted in 1995, 1996 and early 1997. Stipa clarazii and S. tenuisare two important palatable perennial tussock grasses in temperate, semiarid rangelands of centralArgentina, where S. gynerioidesis one of the most abundant, unpalatable perennial grass species. We hypothesized that (1) rootgrowth is reduced after defoliation at any phenological stage in S. claraziiand S. tenuisin comparison to undefoliated controls, (2) root growth, and root appearance and disappearance in all three species decrease as plant water stress increases, and (3) rootgrowth associated with water stress in S. claraziiand S. tenuisis reduced comparatively less when plants are water-stressed earli-er than later, or for a longer period of time during the growing season. Our results led us to reject hypothesis 1 and accept hypothe-ses 2 and 3. Maintenance of root growth after defoliation in S. claraziiand S. tenuiswould allow these species a greater soilexploration and resource finding to sustain regrowth in their native, semiarid environments.
publishDate 2002
dc.date.none.fl_str_mv 2002-12
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/11336/32810
Busso, Carlos Alberto; Montani, Tomás; Fernandez, Osvaldo Alberto; Flemmer, Andrea Cecilia; Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation; Agricultural Inst Canada; Canadian Journal Of Plant Science; 82; 3; 12-2002; 539-547
0008-4220
CONICET Digital
CONICET
url http://hdl.handle.net/11336/32810
identifier_str_mv Busso, Carlos Alberto; Montani, Tomás; Fernandez, Osvaldo Alberto; Flemmer, Andrea Cecilia; Root growth, appearance and disappearance in perennial grasses: Effects of the timing of water stress with or without defoliation; Agricultural Inst Canada; Canadian Journal Of Plant Science; 82; 3; 12-2002; 539-547
0008-4220
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.4141/P00-189
info:eu-repo/semantics/altIdentifier/url/http://www.nrcresearchpress.com/doi/abs/10.4141/P00-189#.WlZFGK7ibIX
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 Agricultural Inst Canada
publisher.none.fl_str_mv Agricultural Inst Canada
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 13.22299

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