Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits

Autores
Dosio, Guillermo Aníbal Adrián; Tardieu, François; Turc, Olivier
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The co-ordination between floret initiation and meristem expansion, and their relationships with carbon availability, were studied and quantified in sunflower (Helianthus annuus) plants subjected to light or water shortages. Meristem size, number of floret primordia, primordium size, rate of plant biomass accumulation, leaf area, photosynthetic rate, and soluble sugar content in the capitulum were measured until completion of floret initiation. Although treatments differentially affected tissue expansion and biomass acquisition, a common relationship between the final number of florets and the rate and duration of meristem expansion was conserved. In the absence of water deficit, changes in relative expansion rate in the meristem paralleled changes in soluble sugar content. Water deficit reduced tissue expansion both in leaves and in the capitulum, and induced the accumulation of soluble sugars in the meristem. Use of these sugars at re-watering was associated with increased meristem growth and higher floret numbers compared with control plants.  Floret initiation and meristem tissue expansion remained strongly co-ordinated under all studied circumstances, and both depended on local carbon availability when water supply was unlimited. Transient water deficits favoured reproductive meristem growth and floret production. Equations accounting for these results constitute a framework for phenotyping the response to drought.
Fil: Dosio, Guillermo Aníbal Adrián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce; Argentina. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; Francia
Fil: Tardieu, François. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; Francia
Fil: Turc, Olivier. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; Francia
Materia
CARBON AVAILIBILITY
FLORET INITIATION
HELIANTHUS ANNUUS (SUNFLOWER)
MERISTEM
SUNFLOWER CAPITULUM
TISSUE EXPANSION RATE
WATER DEFICIT
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:11336/245732
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/245732
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficitsDosio, Guillermo Aníbal AdriánTardieu, FrançoisTurc, OlivierCARBON AVAILIBILITYFLORET INITIATIONHELIANTHUS ANNUUS (SUNFLOWER)MERISTEMSUNFLOWER CAPITULUMTISSUE EXPANSION RATEWATER DEFICIThttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4The co-ordination between floret initiation and meristem expansion, and their relationships with carbon availability, were studied and quantified in sunflower (Helianthus annuus) plants subjected to light or water shortages. Meristem size, number of floret primordia, primordium size, rate of plant biomass accumulation, leaf area, photosynthetic rate, and soluble sugar content in the capitulum were measured until completion of floret initiation. Although treatments differentially affected tissue expansion and biomass acquisition, a common relationship between the final number of florets and the rate and duration of meristem expansion was conserved. In the absence of water deficit, changes in relative expansion rate in the meristem paralleled changes in soluble sugar content. Water deficit reduced tissue expansion both in leaves and in the capitulum, and induced the accumulation of soluble sugars in the meristem. Use of these sugars at re-watering was associated with increased meristem growth and higher floret numbers compared with control plants.  Floret initiation and meristem tissue expansion remained strongly co-ordinated under all studied circumstances, and both depended on local carbon availability when water supply was unlimited. Transient water deficits favoured reproductive meristem growth and floret production. Equations accounting for these results constitute a framework for phenotyping the response to drought.Fil: Dosio, Guillermo Aníbal Adrián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce; Argentina. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; FranciaFil: Tardieu, François. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; FranciaFil: Turc, Olivier. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; FranciaWiley Blackwell Publishing, Inc2011-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/245732Dosio, Guillermo Aníbal Adrián; Tardieu, François; Turc, Olivier; Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits; Wiley Blackwell Publishing, Inc; New Phytologist; 189; 1; 1-2011; 94-1050028-646XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://nph.onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03445.xinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-8137.2010.03445.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:04:58Zoai:ri.conicet.gov.ar:11336/245732instacron: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:34982025-10-22 11:04:58.711CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
title Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
spellingShingle Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
Dosio, Guillermo Aníbal Adrián
CARBON AVAILIBILITY
FLORET INITIATION
HELIANTHUS ANNUUS (SUNFLOWER)
MERISTEM
SUNFLOWER CAPITULUM
TISSUE EXPANSION RATE
WATER DEFICIT
title_short Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
title_full Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
title_fullStr Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
title_full_unstemmed Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
title_sort Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits
dc.creator.none.fl_str_mv Dosio, Guillermo Aníbal Adrián
Tardieu, François
Turc, Olivier
author Dosio, Guillermo Aníbal Adrián
author_facet Dosio, Guillermo Aníbal Adrián
Tardieu, François
Turc, Olivier
author_role author
author2 Tardieu, François
Turc, Olivier
author2_role author
author
dc.subject.none.fl_str_mv CARBON AVAILIBILITY
FLORET INITIATION
HELIANTHUS ANNUUS (SUNFLOWER)
MERISTEM
SUNFLOWER CAPITULUM
TISSUE EXPANSION RATE
WATER DEFICIT
topic CARBON AVAILIBILITY
FLORET INITIATION
HELIANTHUS ANNUUS (SUNFLOWER)
MERISTEM
SUNFLOWER CAPITULUM
TISSUE EXPANSION RATE
WATER DEFICIT
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 co-ordination between floret initiation and meristem expansion, and their relationships with carbon availability, were studied and quantified in sunflower (Helianthus annuus) plants subjected to light or water shortages. Meristem size, number of floret primordia, primordium size, rate of plant biomass accumulation, leaf area, photosynthetic rate, and soluble sugar content in the capitulum were measured until completion of floret initiation. Although treatments differentially affected tissue expansion and biomass acquisition, a common relationship between the final number of florets and the rate and duration of meristem expansion was conserved. In the absence of water deficit, changes in relative expansion rate in the meristem paralleled changes in soluble sugar content. Water deficit reduced tissue expansion both in leaves and in the capitulum, and induced the accumulation of soluble sugars in the meristem. Use of these sugars at re-watering was associated with increased meristem growth and higher floret numbers compared with control plants.  Floret initiation and meristem tissue expansion remained strongly co-ordinated under all studied circumstances, and both depended on local carbon availability when water supply was unlimited. Transient water deficits favoured reproductive meristem growth and floret production. Equations accounting for these results constitute a framework for phenotyping the response to drought.
Fil: Dosio, Guillermo Aníbal Adrián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce; Argentina. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; Francia
Fil: Tardieu, François. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; Francia
Fil: Turc, Olivier. Institut National de la Recherche Agronomique; Francia. Montpellier SupAgro; Francia
description The co-ordination between floret initiation and meristem expansion, and their relationships with carbon availability, were studied and quantified in sunflower (Helianthus annuus) plants subjected to light or water shortages. Meristem size, number of floret primordia, primordium size, rate of plant biomass accumulation, leaf area, photosynthetic rate, and soluble sugar content in the capitulum were measured until completion of floret initiation. Although treatments differentially affected tissue expansion and biomass acquisition, a common relationship between the final number of florets and the rate and duration of meristem expansion was conserved. In the absence of water deficit, changes in relative expansion rate in the meristem paralleled changes in soluble sugar content. Water deficit reduced tissue expansion both in leaves and in the capitulum, and induced the accumulation of soluble sugars in the meristem. Use of these sugars at re-watering was associated with increased meristem growth and higher floret numbers compared with control plants.  Floret initiation and meristem tissue expansion remained strongly co-ordinated under all studied circumstances, and both depended on local carbon availability when water supply was unlimited. Transient water deficits favoured reproductive meristem growth and floret production. Equations accounting for these results constitute a framework for phenotyping the response to drought.
publishDate 2011
dc.date.none.fl_str_mv 2011-01
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/11336/245732
Dosio, Guillermo Aníbal Adrián; Tardieu, François; Turc, Olivier; Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits; Wiley Blackwell Publishing, Inc; New Phytologist; 189; 1; 1-2011; 94-105
0028-646X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/245732
identifier_str_mv Dosio, Guillermo Aníbal Adrián; Tardieu, François; Turc, Olivier; Floret initiation, tissue expansion and carbon availability at the meristem of the sunflower capitulum as affected by water or light deficits; Wiley Blackwell Publishing, Inc; New Phytologist; 189; 1; 1-2011; 94-105
0028-646X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://nph.onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03445.x
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-8137.2010.03445.x
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 Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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 12.982451

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