Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness

Autores
Insua, Juan Ramón; Agnusdei, Mónica Graciela; Di Marco, Oscar Norberto
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The objective of this study was to compare the dynamics of neutral detergent fibre (NDF), and the 24-h in-vitro digestibility of NDF (NDFD) and dry matter (DMD) in leaf blades of two tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) cultivars of different leaf softness: a soft- and a tough-leaved cultivar. The experiment was conducted during the summer regrowth of three replicated, dense mini-swards per cultivar arranged in a completely randomised design, all grown under non-limiting water, nitrogen and phosphorus. Cultivars were harvested eight times over 14 weeks to measure morphogenetic traits and nutritive value in six predefined leaf-age categories (from growing to complete senescence). The leaf lifespan and leaf length of the first three successive leaves were measured on 30 marked tillers throughout the experiment. Following analysis of variance, linear regression models were fitted to describe variations of NDF, NDFD and DMD with increasing leaf age and leaf length. Similar leaf NDF contents were found for the two cultivars, which remained stable throughout the leaf lifespan and increased markedly during leaf senescence. Leaf NDFD and leaf DMD both declined with increasing leaf age and length for the two cultivars. However, owing to shorter leaf lifespan of the soft-leaved cultivar, this decline in leaf NDFD and leaf DMD was faster for the soft- than for the tough-leaved cultivar. These results suggest that the soft-leaved cultivar will require more frequent defoliations than the tough-leafed cultivar to prevent decreases in nutritive value.
Fil: Insua, Juan Ramón. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Agroindustria; Argentina
Fil: Agnusdei, Mónica Graciela. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Di Marco, Oscar Norberto. Universidad Nacional de Mar del Plata; Argentina
Materia
Defoliation
Leaf Development
Leaf Morphology
Leaf Stage
Leaf Turnover
Temperate Grasses
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:11336/78916
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/78916
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network_name_str CONICET Digital (CONICET)
spelling Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softnessInsua, Juan RamónAgnusdei, Mónica GracielaDi Marco, Oscar NorbertoDefoliationLeaf DevelopmentLeaf MorphologyLeaf StageLeaf TurnoverTemperate Grasseshttps://purl.org/becyt/ford/4.2https://purl.org/becyt/ford/4The objective of this study was to compare the dynamics of neutral detergent fibre (NDF), and the 24-h in-vitro digestibility of NDF (NDFD) and dry matter (DMD) in leaf blades of two tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) cultivars of different leaf softness: a soft- and a tough-leaved cultivar. The experiment was conducted during the summer regrowth of three replicated, dense mini-swards per cultivar arranged in a completely randomised design, all grown under non-limiting water, nitrogen and phosphorus. Cultivars were harvested eight times over 14 weeks to measure morphogenetic traits and nutritive value in six predefined leaf-age categories (from growing to complete senescence). The leaf lifespan and leaf length of the first three successive leaves were measured on 30 marked tillers throughout the experiment. Following analysis of variance, linear regression models were fitted to describe variations of NDF, NDFD and DMD with increasing leaf age and leaf length. Similar leaf NDF contents were found for the two cultivars, which remained stable throughout the leaf lifespan and increased markedly during leaf senescence. Leaf NDFD and leaf DMD both declined with increasing leaf age and length for the two cultivars. However, owing to shorter leaf lifespan of the soft-leaved cultivar, this decline in leaf NDFD and leaf DMD was faster for the soft- than for the tough-leaved cultivar. These results suggest that the soft-leaved cultivar will require more frequent defoliations than the tough-leafed cultivar to prevent decreases in nutritive value.Fil: Insua, Juan Ramón. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Agroindustria; ArgentinaFil: Agnusdei, Mónica Graciela. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Di Marco, Oscar Norberto. Universidad Nacional de Mar del Plata; ArgentinaCsiro Publishing2017-01-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78916Insua, Juan Ramón; Agnusdei, Mónica Graciela; Di Marco, Oscar Norberto; Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness; Csiro Publishing; Crop & Pasture Science; 68; 1; 23-1-2017; 51-611836-09471836-5795CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1071/CP16254info:eu-repo/semantics/altIdentifier/url/http://www.publish.csiro.au/cp/CP16254info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:47:28Zoai:ri.conicet.gov.ar:11336/78916instacron: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 09:47:28.996CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
title Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
spellingShingle Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
Insua, Juan Ramón
Defoliation
Leaf Development
Leaf Morphology
Leaf Stage
Leaf Turnover
Temperate Grasses
title_short Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
title_full Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
title_fullStr Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
title_full_unstemmed Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
title_sort Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
dc.creator.none.fl_str_mv Insua, Juan Ramón
Agnusdei, Mónica Graciela
Di Marco, Oscar Norberto
author Insua, Juan Ramón
author_facet Insua, Juan Ramón
Agnusdei, Mónica Graciela
Di Marco, Oscar Norberto
author_role author
author2 Agnusdei, Mónica Graciela
Di Marco, Oscar Norberto
author2_role author
author
dc.subject.none.fl_str_mv Defoliation
Leaf Development
Leaf Morphology
Leaf Stage
Leaf Turnover
Temperate Grasses
topic Defoliation
Leaf Development
Leaf Morphology
Leaf Stage
Leaf Turnover
Temperate Grasses
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.2
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv The objective of this study was to compare the dynamics of neutral detergent fibre (NDF), and the 24-h in-vitro digestibility of NDF (NDFD) and dry matter (DMD) in leaf blades of two tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) cultivars of different leaf softness: a soft- and a tough-leaved cultivar. The experiment was conducted during the summer regrowth of three replicated, dense mini-swards per cultivar arranged in a completely randomised design, all grown under non-limiting water, nitrogen and phosphorus. Cultivars were harvested eight times over 14 weeks to measure morphogenetic traits and nutritive value in six predefined leaf-age categories (from growing to complete senescence). The leaf lifespan and leaf length of the first three successive leaves were measured on 30 marked tillers throughout the experiment. Following analysis of variance, linear regression models were fitted to describe variations of NDF, NDFD and DMD with increasing leaf age and leaf length. Similar leaf NDF contents were found for the two cultivars, which remained stable throughout the leaf lifespan and increased markedly during leaf senescence. Leaf NDFD and leaf DMD both declined with increasing leaf age and length for the two cultivars. However, owing to shorter leaf lifespan of the soft-leaved cultivar, this decline in leaf NDFD and leaf DMD was faster for the soft- than for the tough-leaved cultivar. These results suggest that the soft-leaved cultivar will require more frequent defoliations than the tough-leafed cultivar to prevent decreases in nutritive value.
Fil: Insua, Juan Ramón. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Agroindustria; Argentina
Fil: Agnusdei, Mónica Graciela. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Di Marco, Oscar Norberto. Universidad Nacional de Mar del Plata; Argentina
description The objective of this study was to compare the dynamics of neutral detergent fibre (NDF), and the 24-h in-vitro digestibility of NDF (NDFD) and dry matter (DMD) in leaf blades of two tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) cultivars of different leaf softness: a soft- and a tough-leaved cultivar. The experiment was conducted during the summer regrowth of three replicated, dense mini-swards per cultivar arranged in a completely randomised design, all grown under non-limiting water, nitrogen and phosphorus. Cultivars were harvested eight times over 14 weeks to measure morphogenetic traits and nutritive value in six predefined leaf-age categories (from growing to complete senescence). The leaf lifespan and leaf length of the first three successive leaves were measured on 30 marked tillers throughout the experiment. Following analysis of variance, linear regression models were fitted to describe variations of NDF, NDFD and DMD with increasing leaf age and leaf length. Similar leaf NDF contents were found for the two cultivars, which remained stable throughout the leaf lifespan and increased markedly during leaf senescence. Leaf NDFD and leaf DMD both declined with increasing leaf age and length for the two cultivars. However, owing to shorter leaf lifespan of the soft-leaved cultivar, this decline in leaf NDFD and leaf DMD was faster for the soft- than for the tough-leaved cultivar. These results suggest that the soft-leaved cultivar will require more frequent defoliations than the tough-leafed cultivar to prevent decreases in nutritive value.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-23
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/11336/78916
Insua, Juan Ramón; Agnusdei, Mónica Graciela; Di Marco, Oscar Norberto; Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness; Csiro Publishing; Crop & Pasture Science; 68; 1; 23-1-2017; 51-61
1836-0947
1836-5795
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78916
identifier_str_mv Insua, Juan Ramón; Agnusdei, Mónica Graciela; Di Marco, Oscar Norberto; Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness; Csiro Publishing; Crop & Pasture Science; 68; 1; 23-1-2017; 51-61
1836-0947
1836-5795
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1071/CP16254
info:eu-repo/semantics/altIdentifier/url/http://www.publish.csiro.au/cp/CP16254
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 Csiro Publishing
publisher.none.fl_str_mv Csiro Publishing
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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