Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response

Autores
Martínez, Analía Beatriz Luján; Lema, Verónica Soledad; Capparelli, Aylén; López Anido, Fernando; Benech Arnold, Roberto; Bartoli, Carlos Guillermo
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This work presents the results of physiological studies developed to understand modifications linked to the reduction of seed dormancy provoked by domestication processes. The experiments performed compared wild and domesticated Cucurbita subspecies and their hybrids developed by reciprocal crossings. Seeds of two accessions of the wild subspecies presented dormancy, but it was largely reduced in seeds from the domesticated genotype, and partially reverted in hybrids, especially in those obtained when the domesticated genotype was used as the mother plant. In addition, naked embryos of all subspecies did not display dormancy when incubation was performed at 28°C, but embryo germination was progressively reduced only in the wild genotype under decreasing incubation temperatures (22 and 16°C). In the embryos, abscisic acid (ABA) concentrations were similar in both domesticated and wild subspecies, whereas in the seed coat, it was threefold higher in the wild subspecies. The naked embryos from the wild subspecies were far more responsive to ABA than those from the domesticated subspecies. These results indicate that dormancy in the wild subspecies is imposed by the seed coat tissues and that this effect is mediated by their high ABA content and the sensitivity of the embryos to ABA. These physiological aspects were apparently removed by domestication along with the temperature-dependent response for germination.
Instituto de Fisiología Vegetal
Laboratorio de Etnobotánica y Botánica Aplicada
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/103435

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/103435
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this responseMartínez, Analía Beatriz LujánLema, Verónica SoledadCapparelli, AylénLópez Anido, FernandoBenech Arnold, RobertoBartoli, Carlos GuillermoCiencias NaturalesSeedAbscisic acidCucurbita maximaDomesticationDormancyEmbryoThis work presents the results of physiological studies developed to understand modifications linked to the reduction of seed dormancy provoked by domestication processes. The experiments performed compared wild and domesticated <i>Cucurbita</i> subspecies and their hybrids developed by reciprocal crossings. Seeds of two accessions of the wild subspecies presented dormancy, but it was largely reduced in seeds from the domesticated genotype, and partially reverted in hybrids, especially in those obtained when the domesticated genotype was used as the mother plant. In addition, naked embryos of all subspecies did not display dormancy when incubation was performed at 28°C, but embryo germination was progressively reduced only in the wild genotype under decreasing incubation temperatures (22 and 16°C). In the embryos, abscisic acid (ABA) concentrations were similar in both domesticated and wild subspecies, whereas in the seed coat, it was threefold higher in the wild subspecies. The naked embryos from the wild subspecies were far more responsive to ABA than those from the domesticated subspecies. These results indicate that dormancy in the wild subspecies is imposed by the seed coat tissues and that this effect is mediated by their high ABA content and the sensitivity of the embryos to ABA. These physiological aspects were apparently removed by domestication along with the temperature-dependent response for germination.Instituto de Fisiología VegetalLaboratorio de Etnobotánica y Botánica AplicadaFacultad de Ciencias Naturales y Museo2018-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1-7http://sedici.unlp.edu.ar/handle/10915/103435enginfo:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/seed-science-research/article/differences-in-seed-dormancy-associated-with-the-domestication-of-cucurbita-maxima-elucidation-of-some-mechanisms-behind-this-response/5D23F34734E57B74B087950CA0B891B2info:eu-repo/semantics/altIdentifier/issn/1475-2735info:eu-repo/semantics/altIdentifier/doi/10.1017/S0960258517000320info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:22:28Zoai:sedici.unlp.edu.ar:10915/103435Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:22:28.454SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
title Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
spellingShingle Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
Martínez, Analía Beatriz Luján
Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
title_short Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
title_full Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
title_fullStr Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
title_full_unstemmed Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
title_sort Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
dc.creator.none.fl_str_mv Martínez, Analía Beatriz Luján
Lema, Verónica Soledad
Capparelli, Aylén
López Anido, Fernando
Benech Arnold, Roberto
Bartoli, Carlos Guillermo
author Martínez, Analía Beatriz Luján
author_facet Martínez, Analía Beatriz Luján
Lema, Verónica Soledad
Capparelli, Aylén
López Anido, Fernando
Benech Arnold, Roberto
Bartoli, Carlos Guillermo
author_role author
author2 Lema, Verónica Soledad
Capparelli, Aylén
López Anido, Fernando
Benech Arnold, Roberto
Bartoli, Carlos Guillermo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
topic Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
dc.description.none.fl_txt_mv This work presents the results of physiological studies developed to understand modifications linked to the reduction of seed dormancy provoked by domestication processes. The experiments performed compared wild and domesticated <i>Cucurbita</i> subspecies and their hybrids developed by reciprocal crossings. Seeds of two accessions of the wild subspecies presented dormancy, but it was largely reduced in seeds from the domesticated genotype, and partially reverted in hybrids, especially in those obtained when the domesticated genotype was used as the mother plant. In addition, naked embryos of all subspecies did not display dormancy when incubation was performed at 28°C, but embryo germination was progressively reduced only in the wild genotype under decreasing incubation temperatures (22 and 16°C). In the embryos, abscisic acid (ABA) concentrations were similar in both domesticated and wild subspecies, whereas in the seed coat, it was threefold higher in the wild subspecies. The naked embryos from the wild subspecies were far more responsive to ABA than those from the domesticated subspecies. These results indicate that dormancy in the wild subspecies is imposed by the seed coat tissues and that this effect is mediated by their high ABA content and the sensitivity of the embryos to ABA. These physiological aspects were apparently removed by domestication along with the temperature-dependent response for germination.
Instituto de Fisiología Vegetal
Laboratorio de Etnobotánica y Botánica Aplicada
Facultad de Ciencias Naturales y Museo
description This work presents the results of physiological studies developed to understand modifications linked to the reduction of seed dormancy provoked by domestication processes. The experiments performed compared wild and domesticated <i>Cucurbita</i> subspecies and their hybrids developed by reciprocal crossings. Seeds of two accessions of the wild subspecies presented dormancy, but it was largely reduced in seeds from the domesticated genotype, and partially reverted in hybrids, especially in those obtained when the domesticated genotype was used as the mother plant. In addition, naked embryos of all subspecies did not display dormancy when incubation was performed at 28°C, but embryo germination was progressively reduced only in the wild genotype under decreasing incubation temperatures (22 and 16°C). In the embryos, abscisic acid (ABA) concentrations were similar in both domesticated and wild subspecies, whereas in the seed coat, it was threefold higher in the wild subspecies. The naked embryos from the wild subspecies were far more responsive to ABA than those from the domesticated subspecies. These results indicate that dormancy in the wild subspecies is imposed by the seed coat tissues and that this effect is mediated by their high ABA content and the sensitivity of the embryos to ABA. These physiological aspects were apparently removed by domestication along with the temperature-dependent response for germination.
publishDate 2018
dc.date.none.fl_str_mv 2018-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/103435
url http://sedici.unlp.edu.ar/handle/10915/103435
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/seed-science-research/article/differences-in-seed-dormancy-associated-with-the-domestication-of-cucurbita-maxima-elucidation-of-some-mechanisms-behind-this-response/5D23F34734E57B74B087950CA0B891B2
info:eu-repo/semantics/altIdentifier/issn/1475-2735
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0960258517000320
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
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