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

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...

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Autores principales: Martínez, Analía Beatriz Luján, Lema, Verónica Soledad, Capparelli, Aylén, López Anido, Fernando, Benech Arnold, Roberto, Bartoli, Carlos Guillermo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/103435
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
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-103435
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
spellingShingle Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
Martínez, Analía Beatriz Luján
Lema, Verónica Soledad
Capparelli, Aylén
López Anido, Fernando
Benech Arnold, Roberto
Bartoli, Carlos Guillermo
Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
topic_facet Ciencias Naturales
Seed
Abscisic acid
Cucurbita maxima
Domestication
Dormancy
Embryo
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.
format Articulo
Articulo
author Martínez, Analía Beatriz Luján
Lema, Verónica Soledad
Capparelli, Aylén
López Anido, Fernando
Benech Arnold, Roberto
Bartoli, Carlos Guillermo
author_facet Martínez, Analía Beatriz Luján
Lema, Verónica Soledad
Capparelli, Aylén
López Anido, Fernando
Benech Arnold, Roberto
Bartoli, Carlos Guillermo
author_sort Martínez, Analía Beatriz Luján
title Differences in seed dormancy associated with the domestication of <i>Cucurbita maxima</i> : Elucidation of some mechanisms behind this response
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
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/103435
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
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