Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains

Autores
Echarte, Maria Mercedes; Alberdi, Ignacio; Aguirrezábal, Luis Adolfo Nazareno
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fatty acid composition of Helianthus annuus L. (sunflower) oil depends on intercepted solar radiation per plant (ISR) during grain filling. This effect could be accounted by the assimilate availability for the grains (the source-sink ratio). However, the current physiological-biochemical knowledge does not consider any effect of carbon availability on oil fatty acid composition. The objective of this work was to address the regulation of fatty acid composition by assimilate supply to sunflower grains. A wide range of source-sink ratios was obtained by manipulating either the source or the sink during grain filling. Assimilate supply was also modified by injecting sucrose to the receptacle of sunflower capitula. Grain weight and oil content depended on both ISR and source-sink ratio in a curvilinear manner. When sink size was decreased by grain excision, ISR failed to explain oil fatty acid composition while source-sink ratio appropriately described it. Sucrose injection significantly increased grain weight, oil content and oleic acid percentage of shaded plants. It is concluded that effects of ISR on fatty acid composition are a consequence of changes in assimilate availability for grain oil synthesis. To explain these results a conceptual model is proposed: when assimilate supply limits grain growth and oil synthesis, mainly linoleic acid is synthesized. As the assimilate supply increases, oleic acid desaturation process gets saturated and oleic acid accumulates.
Fil: Echarte, Maria Mercedes. 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
Fil: Alberdi, Ignacio. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Fil: Aguirrezábal, Luis Adolfo Nazareno. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Materia
CROP PHYSIOLOGY AND METABOLISM
SUNFLOWER
PLANT AND ENVIRONMENT INTERACTION
SEED QUALITY
FATTY ACID COMPOSITION
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:11336/197110
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/197110
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Post flowering assimilate availability regulates oil fatty acid composition in sunflower grainsEcharte, Maria MercedesAlberdi, IgnacioAguirrezábal, Luis Adolfo NazarenoCROP PHYSIOLOGY AND METABOLISMSUNFLOWERPLANT AND ENVIRONMENT INTERACTIONSEED QUALITYFATTY ACID COMPOSITIONhttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Fatty acid composition of Helianthus annuus L. (sunflower) oil depends on intercepted solar radiation per plant (ISR) during grain filling. This effect could be accounted by the assimilate availability for the grains (the source-sink ratio). However, the current physiological-biochemical knowledge does not consider any effect of carbon availability on oil fatty acid composition. The objective of this work was to address the regulation of fatty acid composition by assimilate supply to sunflower grains. A wide range of source-sink ratios was obtained by manipulating either the source or the sink during grain filling. Assimilate supply was also modified by injecting sucrose to the receptacle of sunflower capitula. Grain weight and oil content depended on both ISR and source-sink ratio in a curvilinear manner. When sink size was decreased by grain excision, ISR failed to explain oil fatty acid composition while source-sink ratio appropriately described it. Sucrose injection significantly increased grain weight, oil content and oleic acid percentage of shaded plants. It is concluded that effects of ISR on fatty acid composition are a consequence of changes in assimilate availability for grain oil synthesis. To explain these results a conceptual model is proposed: when assimilate supply limits grain growth and oil synthesis, mainly linoleic acid is synthesized. As the assimilate supply increases, oleic acid desaturation process gets saturated and oleic acid accumulates.Fil: Echarte, Maria Mercedes. 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; ArgentinaFil: Alberdi, Ignacio. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Aguirrezábal, Luis Adolfo Nazareno. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaCrop Science Society of America2012-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/197110Echarte, Maria Mercedes; Alberdi, Ignacio; Aguirrezábal, Luis Adolfo Nazareno; Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains; Crop Science Society of America; Crop Science; 52; 2; 9-2012; 818-8290011-183XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://acsess.onlinelibrary.wiley.com/doi/full/10.2135/cropsci2011.09.0477info:eu-repo/semantics/altIdentifier/doi/10.2135/cropsci2011.09.0477info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:33:28Zoai:ri.conicet.gov.ar:11336/197110instacron: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 11:33:28.85CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
title Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
spellingShingle Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
Echarte, Maria Mercedes
CROP PHYSIOLOGY AND METABOLISM
SUNFLOWER
PLANT AND ENVIRONMENT INTERACTION
SEED QUALITY
FATTY ACID COMPOSITION
title_short Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
title_full Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
title_fullStr Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
title_full_unstemmed Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
title_sort Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains
dc.creator.none.fl_str_mv Echarte, Maria Mercedes
Alberdi, Ignacio
Aguirrezábal, Luis Adolfo Nazareno
author Echarte, Maria Mercedes
author_facet Echarte, Maria Mercedes
Alberdi, Ignacio
Aguirrezábal, Luis Adolfo Nazareno
author_role author
author2 Alberdi, Ignacio
Aguirrezábal, Luis Adolfo Nazareno
author2_role author
author
dc.subject.none.fl_str_mv CROP PHYSIOLOGY AND METABOLISM
SUNFLOWER
PLANT AND ENVIRONMENT INTERACTION
SEED QUALITY
FATTY ACID COMPOSITION
topic CROP PHYSIOLOGY AND METABOLISM
SUNFLOWER
PLANT AND ENVIRONMENT INTERACTION
SEED QUALITY
FATTY ACID COMPOSITION
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Fatty acid composition of Helianthus annuus L. (sunflower) oil depends on intercepted solar radiation per plant (ISR) during grain filling. This effect could be accounted by the assimilate availability for the grains (the source-sink ratio). However, the current physiological-biochemical knowledge does not consider any effect of carbon availability on oil fatty acid composition. The objective of this work was to address the regulation of fatty acid composition by assimilate supply to sunflower grains. A wide range of source-sink ratios was obtained by manipulating either the source or the sink during grain filling. Assimilate supply was also modified by injecting sucrose to the receptacle of sunflower capitula. Grain weight and oil content depended on both ISR and source-sink ratio in a curvilinear manner. When sink size was decreased by grain excision, ISR failed to explain oil fatty acid composition while source-sink ratio appropriately described it. Sucrose injection significantly increased grain weight, oil content and oleic acid percentage of shaded plants. It is concluded that effects of ISR on fatty acid composition are a consequence of changes in assimilate availability for grain oil synthesis. To explain these results a conceptual model is proposed: when assimilate supply limits grain growth and oil synthesis, mainly linoleic acid is synthesized. As the assimilate supply increases, oleic acid desaturation process gets saturated and oleic acid accumulates.
Fil: Echarte, Maria Mercedes. 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
Fil: Alberdi, Ignacio. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Fil: Aguirrezábal, Luis Adolfo Nazareno. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
description Fatty acid composition of Helianthus annuus L. (sunflower) oil depends on intercepted solar radiation per plant (ISR) during grain filling. This effect could be accounted by the assimilate availability for the grains (the source-sink ratio). However, the current physiological-biochemical knowledge does not consider any effect of carbon availability on oil fatty acid composition. The objective of this work was to address the regulation of fatty acid composition by assimilate supply to sunflower grains. A wide range of source-sink ratios was obtained by manipulating either the source or the sink during grain filling. Assimilate supply was also modified by injecting sucrose to the receptacle of sunflower capitula. Grain weight and oil content depended on both ISR and source-sink ratio in a curvilinear manner. When sink size was decreased by grain excision, ISR failed to explain oil fatty acid composition while source-sink ratio appropriately described it. Sucrose injection significantly increased grain weight, oil content and oleic acid percentage of shaded plants. It is concluded that effects of ISR on fatty acid composition are a consequence of changes in assimilate availability for grain oil synthesis. To explain these results a conceptual model is proposed: when assimilate supply limits grain growth and oil synthesis, mainly linoleic acid is synthesized. As the assimilate supply increases, oleic acid desaturation process gets saturated and oleic acid accumulates.
publishDate 2012
dc.date.none.fl_str_mv 2012-09
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/11336/197110
Echarte, Maria Mercedes; Alberdi, Ignacio; Aguirrezábal, Luis Adolfo Nazareno; Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains; Crop Science Society of America; Crop Science; 52; 2; 9-2012; 818-829
0011-183X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/197110
identifier_str_mv Echarte, Maria Mercedes; Alberdi, Ignacio; Aguirrezábal, Luis Adolfo Nazareno; Post flowering assimilate availability regulates oil fatty acid composition in sunflower grains; Crop Science Society of America; Crop Science; 52; 2; 9-2012; 818-829
0011-183X
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://acsess.onlinelibrary.wiley.com/doi/full/10.2135/cropsci2011.09.0477
info:eu-repo/semantics/altIdentifier/doi/10.2135/cropsci2011.09.0477
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 Crop Science Society of America
publisher.none.fl_str_mv Crop Science Society of America
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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