Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)

Detalhes bibliográficos
Autor(a) principal: Torices, Rubén
Data de Publicação: 2013
Outros Autores: Agudo, Alicia, Álvarez, Inés
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/109701
https://doi.org/10.3989/ajbm.2351
Resumo: The production of two or more distinct fruit types by an individual, i.e. hete - rocarpy, is considered as a mixed dispersal strategy in which a proportion of the offspring is able to colonize new sites, whilst others remain near the maternal location. Here, we aimed to explore the effects of achene morphology (winged vs. unwinged achenes) and achene size –measured here as achene mass– on post-dispersal life-history traits (probability and time of seedling emergence) in three heterocarpic Anacyclus species (Anthemideae, Asteraceae). Morphology, size and germination performance were studied in achenes from six populations of Anacyclus clavatus (Desf.) Pers., A. homogamos (Maire) Humphries, and A. valentinus L. Our results show that achene morphology and size were related to their position within the capitulum, such that outer, winged achenes were significantly heavier than the inner, unwinged ones. Additionally, winged achenes germinated faster than unwinged ones. This pattern may be related to the sequential achene time of release displayed by these species. Finally, our findings cast doubt on the role of wings as structures that favor dispersal by wind in these three species of Anacyclus.
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spelling Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)bet-hedgingCompositaeheterocarpymixed strategyposition effectsweedswinged fruitsbet-hedgingCompositaeheterocarpiaestrategia mixtaefectos de posiciónmalas hierbasfrutos aladosThe production of two or more distinct fruit types by an individual, i.e. hete - rocarpy, is considered as a mixed dispersal strategy in which a proportion of the offspring is able to colonize new sites, whilst others remain near the maternal location. Here, we aimed to explore the effects of achene morphology (winged vs. unwinged achenes) and achene size –measured here as achene mass– on post-dispersal life-history traits (probability and time of seedling emergence) in three heterocarpic Anacyclus species (Anthemideae, Asteraceae). Morphology, size and germination performance were studied in achenes from six populations of Anacyclus clavatus (Desf.) Pers., A. homogamos (Maire) Humphries, and A. valentinus L. Our results show that achene morphology and size were related to their position within the capitulum, such that outer, winged achenes were significantly heavier than the inner, unwinged ones. Additionally, winged achenes germinated faster than unwinged ones. This pattern may be related to the sequential achene time of release displayed by these species. Finally, our findings cast doubt on the role of wings as structures that favor dispersal by wind in these three species of Anacyclus.La producción de dos o más tipos de frutos diferentes por un mismo individuo, i.e. heterocarpia, es considerada como una estrategia mixta de dispersión en la que una parte de la descendencia es capaz de colonizar nuevos sitios, mientras que la otra permanece cerca de la planta madre. En este trabajo, nuestro objetivo fue explorar los efectos de la morfología del aquenio (aquenios alados vs. no alados) y de su tamaño –medido aquí como masa del aquenio– en la etapa del ciclo de vida siguiente a la dispersión (probabilidad de germinación y tiempo de emergencia de las plántulas) de tres especies heterocárpicas del género Anacyclus (Anthemideae, Asteraceae). Se estudió la morfología, el tamaño y la germinación en aquenios de seis poblaciones de Anacyclus clavatus (Desf.) Pers., A. homogamos (Maire) Humphries y A. valentinus L. Nuestros resultados indican que tanto la morfología del aquenio como su tamaño estaban relacionados con su posición en el capítulo, de manera que los aquenios más externos –alados– eran significativamente más pesados que los internos –sin alas–. Además, los aquenios alados germinaron más rápidamente que los no alados. Este patrón puede estar relacionado con la liberación secuencial de los aquenios que ocurre en estas especies. Por último, nuestros resultados ponen en duda la función de las alas como estructuras que favorecen la dispersión por viento de los aquenios en estas tres especies de Anacyclus.El Jardin2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/109701http://hdl.handle.net/10316/109701https://doi.org/10.3989/ajbm.2351eng1988-31960211-1322Torices, RubénAgudo, AliciaÁlvarez, Inésinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-10-23T09:30:52Zoai:estudogeral.uc.pt:10316/109701Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:25:51.288680Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
title Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
spellingShingle Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
Torices, Rubén
bet-hedging
Compositae
heterocarpy
mixed strategy
position effects
weeds
winged fruits
bet-hedging
Compositae
heterocarpia
estrategia mixta
efectos de posición
malas hierbas
frutos alados
title_short Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
title_full Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
title_fullStr Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
title_full_unstemmed Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
title_sort Not only size matters: achene morphology affects time of seedling emergence in three heterocarpic species of <i>Anacyclus</i> (Anthemideae, Asteraceae)
author Torices, Rubén
author_facet Torices, Rubén
Agudo, Alicia
Álvarez, Inés
author_role author
author2 Agudo, Alicia
Álvarez, Inés
author2_role author
author
dc.contributor.author.fl_str_mv Torices, Rubén
Agudo, Alicia
Álvarez, Inés
dc.subject.por.fl_str_mv bet-hedging
Compositae
heterocarpy
mixed strategy
position effects
weeds
winged fruits
bet-hedging
Compositae
heterocarpia
estrategia mixta
efectos de posición
malas hierbas
frutos alados
topic bet-hedging
Compositae
heterocarpy
mixed strategy
position effects
weeds
winged fruits
bet-hedging
Compositae
heterocarpia
estrategia mixta
efectos de posición
malas hierbas
frutos alados
description The production of two or more distinct fruit types by an individual, i.e. hete - rocarpy, is considered as a mixed dispersal strategy in which a proportion of the offspring is able to colonize new sites, whilst others remain near the maternal location. Here, we aimed to explore the effects of achene morphology (winged vs. unwinged achenes) and achene size –measured here as achene mass– on post-dispersal life-history traits (probability and time of seedling emergence) in three heterocarpic Anacyclus species (Anthemideae, Asteraceae). Morphology, size and germination performance were studied in achenes from six populations of Anacyclus clavatus (Desf.) Pers., A. homogamos (Maire) Humphries, and A. valentinus L. Our results show that achene morphology and size were related to their position within the capitulum, such that outer, winged achenes were significantly heavier than the inner, unwinged ones. Additionally, winged achenes germinated faster than unwinged ones. This pattern may be related to the sequential achene time of release displayed by these species. Finally, our findings cast doubt on the role of wings as structures that favor dispersal by wind in these three species of Anacyclus.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/109701
http://hdl.handle.net/10316/109701
https://doi.org/10.3989/ajbm.2351
url http://hdl.handle.net/10316/109701
https://doi.org/10.3989/ajbm.2351
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1988-3196
0211-1322
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv El Jardin
publisher.none.fl_str_mv El Jardin
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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