Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.

Seed production in plants depends on the joint action of intrinsic and extrinsic factors. Knowledge of these factors may, eventually, be key to understanding the causes of species extinction. A failure in seed production can be caused by an insufficient pollination service; although, an intrinsic fa...

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Detalles Bibliográficos
Autor: García-Guzmán, Patricio Andrés
Tipo de recurso: tesis doctoral
Estado:Versión publicada
Fecha de publicación:2020
País:Chile
OAI Identifier:oai:repositorio.anid.cl:10533/249811
Acceso en línea:https://hdl.handle.net/10533/249811
Access Level:acceso abierto
Palabra clave:Ciencias Naturales
Ciencias de la Tierra y del Medio Ambiente
Botánica
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dc.title.es_CL.fl_str_mv Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
Análisis de factores intrínsecos y extrínsecos en el éxito reproductivo de Myrcianthes coquimbensis, una especie amenazada del desierto de Atacama, Chile.
title Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
spellingShingle Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
García-Guzmán, Patricio Andrés
Ciencias Naturales
Ciencias de la Tierra y del Medio Ambiente
Botánica
title_short Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
title_full Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
title_fullStr Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
title_full_unstemmed Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
title_sort Analysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.
dc.creator.none.fl_str_mv García-Guzmán, Patricio Andrés
author García-Guzmán, Patricio Andrés
author_facet García-Guzmán, Patricio Andrés
author_role author
dc.contributor.advisor.none.fl_str_mv Squeo, Francisco A.
dc.contributor.institution.es_CL.fl_str_mv UNIVERSIDAD DE LA SERENA
dc.subject.oecd1n.es_CL.fl_str_mv Ciencias Naturales
topic Ciencias Naturales
Ciencias de la Tierra y del Medio Ambiente
Botánica
dc.subject.oecd2n.es_CL.fl_str_mv Ciencias de la Tierra y del Medio Ambiente
dc.subject.oecd3n.es_CL.fl_str_mv Botánica
description Seed production in plants depends on the joint action of intrinsic and extrinsic factors. Knowledge of these factors may, eventually, be key to understanding the causes of species extinction. A failure in seed production can be caused by an insufficient pollination service; although, an intrinsic factor such as the mixed reproductive system, can ensure seed production in conditions when pollination service fails. This reproductive assurance, however, may disappear if seeds produce by selfing presents inbreeding depression, which can be enhanced by an insufficient allocation of resources by mother plants. In this thesis, different reproductive processes were analyzed in Myrcianthes coquimbensis, by examining the role of its reproductive system, the pollination environment, and the availability of resources. First, although seed production occurs mainly by outcrossing, it can also occur by selfing and agamospermia; however, autonomous selfing interferes with outcrossing in the flowers. Second, seed production was pollen limited in two populations; the degree of pollen limitation was negatively and positively associated with different components of the pollination environment. Third, the seeds produced presented inbreeding depression and its magnitude was greater in mother plants subject to greater water availability. Inbreeding depression negatively affected seedling performance, but indirectly through the initial seed size. Seed production in M. coquimbensis may be compromised pollen limitation and selfing cannot ensure it, due to interference (intra-flower) and inbreeding depression. The latter could be even more harmful in situations with high water availability, such as in years of extreme precipitation. Future studies should focus on the maintenance and conservation of environmental conditions that do not promote the incidence and magnitude of selfing in plants.
publishDate 2020
dc.date.issued.es_CL.fl_str_mv 2020
dc.date.accessioned.none.fl_str_mv 2021-05-31T21:06:03Z
2022-08-23T03:11:09Z
dc.date.available.none.fl_str_mv 2021-05-31T21:06:03Z
2022-08-23T03:11:09Z
dc.type.none.fl_str_mv Tesis Doctorado
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dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10533/249811
identifier_str_mv 21120854
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spelling UNIVERSIDAD DE LA SERENAGarcía-Guzmán, Patricio Andrés2020https://hdl.handle.net/10533/249811http://purl.org/coar/access_right/c_abf2BotánicaCiencias de la Tierra y del Medio AmbienteCiencias NaturalesAnalysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.Squeo, Francisco A.UNIVERSIDAD DE LA SERENAChileGarcía-Guzmán, Patricio Andrés2021-05-31T21:06:03Z2022-08-23T03:11:09Z2021-05-31T21:06:03Z2022-08-23T03:11:09Z2020Seed production in plants depends on the joint action of intrinsic and extrinsic factors. Knowledge of these factors may, eventually, be key to understanding the causes of species extinction. A failure in seed production can be caused by an insufficient pollination service; although, an intrinsic factor such as the mixed reproductive system, can ensure seed production in conditions when pollination service fails. This reproductive assurance, however, may disappear if seeds produce by selfing presents inbreeding depression, which can be enhanced by an insufficient allocation of resources by mother plants. In this thesis, different reproductive processes were analyzed in Myrcianthes coquimbensis, by examining the role of its reproductive system, the pollination environment, and the availability of resources. First, although seed production occurs mainly by outcrossing, it can also occur by selfing and agamospermia; however, autonomous selfing interferes with outcrossing in the flowers. Second, seed production was pollen limited in two populations; the degree of pollen limitation was negatively and positively associated with different components of the pollination environment. Third, the seeds produced presented inbreeding depression and its magnitude was greater in mother plants subject to greater water availability. Inbreeding depression negatively affected seedling performance, but indirectly through the initial seed size. Seed production in M. coquimbensis may be compromised pollen limitation and selfing cannot ensure it, due to interference (intra-flower) and inbreeding depression. The latter could be even more harmful in situations with high water availability, such as in years of extreme precipitation. Future studies should focus on the maintenance and conservation of environmental conditions that do not promote the incidence and magnitude of selfing in plants.La producción de semillas en las plantas depende de la acción conjunta de factores intrínsecos y extrínsecos. El conocimiento de estos factores puede, eventualmente, ser clave para entender las causas de la extinción de las especies. Un fallo en la producción de semillas puede ser ocasionado por un servicio de polinización insuficiente; sin embargo, un factor intrínseco como el sistema reproductivo mixto, permite asegurar la producción de semillas en condiciones cuando el servicio de polinización falla. No obstante, la producción de semillas por autofecundación puede fallar si estas presentan depresión por endogamia, y más aún, este fallo puede potenciarse por una asignación insuficiente de recursos por parte de las plantas madre. En esta tesis se estudiaron diferentes procesos reproductivos en Myrcianthes coquimbensis, examinando el rol de su sistema reproductivo, el ambiente de polinización y la disponibilidad de recursos. Primero, si bien la producción de semillas ocurre principalmente por fecundación cruzada, también pude ocurrir por autofecundación y agamospermia; sin embargo, la autofecundación autónoma interfiere con la fecundación cruzada en las flores. Segundo, la producción de frutos y semillas en dos poblaciones estuvo limitada por la disponibilidad de polen; esta limitación se asoció negativa y positivamente con diferentes componentes del ambiente de polinización. Tercero, las semillas presentaron depresión por endogamia y su magnitud fue mayor en de plantas madre sujetas a una mayor disponibilidad de agua; la depresión por endogamia afectó negativamente desempeño de plántulas, pero de forma indirecta a través del tamaño de las semillas. La producción de semillas en M. coquimbensis puede estar comprometida por la disponibilidad de polen y la autofecundación no puede asegurarla, debido a la interferencia (intra-flor) y depresión por endogamia. Esta última, pudiese ser más perjudicial en situaciones con mayor disponibilidad de agua, como en años de precipitación extrema. Futuros estudios debiesen enfocarse al mantenimiento y conservación de condiciones ambientales que no fomenten la incidencia y magnitud de autofecundación en las plantas.21120854https://hdl.handle.net/10533/249811instname: Conicytreponame: Repositorio Digital RI2.0info:eu-repo/grantAgreement//21120854info:eu-repo/semantics/dataset/hdl.handle.net/10533/93488info:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivs 3.0 Chilehttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/Ciencias NaturalesCiencias de la Tierra y del Medio AmbienteBotánicaAnalysis of intrinsic and extrinsic factors in the reproductive success of Myrcianthes coquimbensis, a threatened species of the Atacama desert, Chile.Análisis de factores intrínsecos y extrínsecos en el éxito reproductivo de Myrcianthes coquimbensis, una especie amenazada del desierto de Atacama, Chile.Tesis Doctoradoinfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionTesisTesishttps://hdl.handle.net/10533/2498117608770a-bbbf-437a-9533-2014542be977virtual::62815-17608770a-bbbf-437a-9533-2014542be977virtual::62815-1THUMBNAILTesisDrBEA_PGarcia_(2020).pdf.jpgIM Thumbnailimage/jpeg4148https://repositorio.anid.cl/bitstreams/8ac5dd45-2c00-4f58-b946-7c0af732f5a7/download47dd09052349040757165f9d8b5813feMD51CC-LICENSElicense_rdfapplication/octet-stream1232https://repositorio.anid.cl/bitstreams/f92cb8e2-324d-4c56-a91c-3d652fb1449f/downloadf97bcfdf58f3e17b5cec231112dab5b1MD52LICENSElicense.txttext/plain1779https://repositorio.anid.cl/bitstreams/7e9dc71f-8a01-41d5-94da-1811f723fdef/download593a6e7305c66c56041a9f9e15a649c1MD53ORIGINALTesisDrBEA_PGarcia_(2020).pdfapplication/pdf4196325https://repositorio.anid.cl/bitstreams/0271eb49-5ad4-40f1-a2ac-82b7aa2eb5ea/downloadbd912ec1a26b827e3aa0b67116d7faa8MD5410533/249811oai:repositorio.anid.cl:10533/2498112023-07-24 10:20:58.125http://creativecommons.org/licenses/by-nc-nd/3.0/cl/info:eu-repo/semantics/openAccesshttps://repositorio.anid.clRepositorio ANIDaletelier@anid.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