Profiles of leaf senescence during reproductive growth of sunflower and maize

Autores
Sadras, Victor Oscar; Echarte, Laura; Andrade, Fernando Héctor
Año de publicación
1999
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We investigated the effect of reproductive growth on the profiles of leaf senescence in maize (Zea mays L.) and sunflower (Helianthus annuus L.). Leaf senescence after flowering was assessed using both structural (leaf chlorophyll, nitrogen and dry matter) and functional (photosynthesis) variables in undisturbed plants (+G) and in plants in which grain set was prevented (-G). Two weeks after flowering, lack of grain accelerated senescence in maize and delayed senescence in sunflower as indicated by leaf chlorophyll; leaf nitrogen and dry matter were less sensitive response variables. Lack of interaction between reproductive treatment and leaf position indicates that the senescence signal, whatever its nature, was equally effective throughout the plant in both species. In both species, feedback inhibition of photosynthesis was first detected 30-35 d after flowering; excess carbohydrate in the leaves was therefore an unlikely trigger of accelerated senescence in maize. As reproductive development progressed, differences between +G and -G plants were more marked in sunflower, and tended to disappear or reverse in maize. In sunflower, interactions between leaf position and reproductive treatment - attributable to the local effect of grain - were detected around 20-27 d after flowering.
Fil: Sadras, Victor Oscar. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Echarte, Laura. Universidad Nacional de Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce. Área de Investigación en Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Andrade, Fernando Héctor. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Chlorophyll
Helianthus Annuus
Light
Nitrogen
Photosynthesis
Reproductive Growth
Senescence
Source-Sink
Spad
Zea Mays
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:11336/76079
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/76079
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Profiles of leaf senescence during reproductive growth of sunflower and maizeSadras, Victor OscarEcharte, LauraAndrade, Fernando HéctorChlorophyllHelianthus AnnuusLightNitrogenPhotosynthesisReproductive GrowthSenescenceSource-SinkSpadZea Mayshttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4We investigated the effect of reproductive growth on the profiles of leaf senescence in maize (Zea mays L.) and sunflower (Helianthus annuus L.). Leaf senescence after flowering was assessed using both structural (leaf chlorophyll, nitrogen and dry matter) and functional (photosynthesis) variables in undisturbed plants (+G) and in plants in which grain set was prevented (-G). Two weeks after flowering, lack of grain accelerated senescence in maize and delayed senescence in sunflower as indicated by leaf chlorophyll; leaf nitrogen and dry matter were less sensitive response variables. Lack of interaction between reproductive treatment and leaf position indicates that the senescence signal, whatever its nature, was equally effective throughout the plant in both species. In both species, feedback inhibition of photosynthesis was first detected 30-35 d after flowering; excess carbohydrate in the leaves was therefore an unlikely trigger of accelerated senescence in maize. As reproductive development progressed, differences between +G and -G plants were more marked in sunflower, and tended to disappear or reverse in maize. In sunflower, interactions between leaf position and reproductive treatment - attributable to the local effect of grain - were detected around 20-27 d after flowering.Fil: Sadras, Victor Oscar. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Echarte, Laura. Universidad Nacional de Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce. Área de Investigación en Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Andrade, Fernando Héctor. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaOxford University Press1999-10-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/76079Sadras, Victor Oscar; Echarte, Laura; Andrade, Fernando Héctor; Profiles of leaf senescence during reproductive growth of sunflower and maize; Oxford University Press; Annals of Botany; 85; 2; 4-10-1999; 187-1950305-73641095-8290CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1006/anbo.1999.1013info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/aob/article/85/2/187/2588129info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:13:34Zoai:ri.conicet.gov.ar:11336/76079instacron: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 15:13:34.483CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Profiles of leaf senescence during reproductive growth of sunflower and maize
title Profiles of leaf senescence during reproductive growth of sunflower and maize
spellingShingle Profiles of leaf senescence during reproductive growth of sunflower and maize
Sadras, Victor Oscar
Chlorophyll
Helianthus Annuus
Light
Nitrogen
Photosynthesis
Reproductive Growth
Senescence
Source-Sink
Spad
Zea Mays
title_short Profiles of leaf senescence during reproductive growth of sunflower and maize
title_full Profiles of leaf senescence during reproductive growth of sunflower and maize
title_fullStr Profiles of leaf senescence during reproductive growth of sunflower and maize
title_full_unstemmed Profiles of leaf senescence during reproductive growth of sunflower and maize
title_sort Profiles of leaf senescence during reproductive growth of sunflower and maize
dc.creator.none.fl_str_mv Sadras, Victor Oscar
Echarte, Laura
Andrade, Fernando Héctor
author Sadras, Victor Oscar
author_facet Sadras, Victor Oscar
Echarte, Laura
Andrade, Fernando Héctor
author_role author
author2 Echarte, Laura
Andrade, Fernando Héctor
author2_role author
author
dc.subject.none.fl_str_mv Chlorophyll
Helianthus Annuus
Light
Nitrogen
Photosynthesis
Reproductive Growth
Senescence
Source-Sink
Spad
Zea Mays
topic Chlorophyll
Helianthus Annuus
Light
Nitrogen
Photosynthesis
Reproductive Growth
Senescence
Source-Sink
Spad
Zea Mays
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv We investigated the effect of reproductive growth on the profiles of leaf senescence in maize (Zea mays L.) and sunflower (Helianthus annuus L.). Leaf senescence after flowering was assessed using both structural (leaf chlorophyll, nitrogen and dry matter) and functional (photosynthesis) variables in undisturbed plants (+G) and in plants in which grain set was prevented (-G). Two weeks after flowering, lack of grain accelerated senescence in maize and delayed senescence in sunflower as indicated by leaf chlorophyll; leaf nitrogen and dry matter were less sensitive response variables. Lack of interaction between reproductive treatment and leaf position indicates that the senescence signal, whatever its nature, was equally effective throughout the plant in both species. In both species, feedback inhibition of photosynthesis was first detected 30-35 d after flowering; excess carbohydrate in the leaves was therefore an unlikely trigger of accelerated senescence in maize. As reproductive development progressed, differences between +G and -G plants were more marked in sunflower, and tended to disappear or reverse in maize. In sunflower, interactions between leaf position and reproductive treatment - attributable to the local effect of grain - were detected around 20-27 d after flowering.
Fil: Sadras, Victor Oscar. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Echarte, Laura. Universidad Nacional de Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce. Área de Investigación en Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Andrade, Fernando Héctor. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We investigated the effect of reproductive growth on the profiles of leaf senescence in maize (Zea mays L.) and sunflower (Helianthus annuus L.). Leaf senescence after flowering was assessed using both structural (leaf chlorophyll, nitrogen and dry matter) and functional (photosynthesis) variables in undisturbed plants (+G) and in plants in which grain set was prevented (-G). Two weeks after flowering, lack of grain accelerated senescence in maize and delayed senescence in sunflower as indicated by leaf chlorophyll; leaf nitrogen and dry matter were less sensitive response variables. Lack of interaction between reproductive treatment and leaf position indicates that the senescence signal, whatever its nature, was equally effective throughout the plant in both species. In both species, feedback inhibition of photosynthesis was first detected 30-35 d after flowering; excess carbohydrate in the leaves was therefore an unlikely trigger of accelerated senescence in maize. As reproductive development progressed, differences between +G and -G plants were more marked in sunflower, and tended to disappear or reverse in maize. In sunflower, interactions between leaf position and reproductive treatment - attributable to the local effect of grain - were detected around 20-27 d after flowering.
publishDate 1999
dc.date.none.fl_str_mv 1999-10-04
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/11336/76079
Sadras, Victor Oscar; Echarte, Laura; Andrade, Fernando Héctor; Profiles of leaf senescence during reproductive growth of sunflower and maize; Oxford University Press; Annals of Botany; 85; 2; 4-10-1999; 187-195
0305-7364
1095-8290
CONICET Digital
CONICET
url http://hdl.handle.net/11336/76079
identifier_str_mv Sadras, Victor Oscar; Echarte, Laura; Andrade, Fernando Héctor; Profiles of leaf senescence during reproductive growth of sunflower and maize; Oxford University Press; Annals of Botany; 85; 2; 4-10-1999; 187-195
0305-7364
1095-8290
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1006/anbo.1999.1013
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/aob/article/85/2/187/2588129
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
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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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