From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)

Detalhes bibliográficos
Autor(a) principal: Brilhante, Miguel Ângelo Filipe
Data de Publicação: 2019
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/41697
Resumo: Tese de mestrado, Biologia dos Recursos Vegetais, Universidade de Lisboa, Faculdade de Ciências, 2019
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spelling From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)ConservaçãoEspécies endémicas insularesIlhas oceânicasTamanho do genomaTraits reprodutivosTeses de mestrado - 2019Departamento de Biologia VegetalTese de mestrado, Biologia dos Recursos Vegetais, Universidade de Lisboa, Faculdade de Ciências, 2019Macaronesian region comprises five archipelagos (i.e., Azores, Madeira, Selvagens, Canary Islands and Cabo Verde) in the Northeastern Atlantic Ocean. Volcanic in nature, all archipelagos reach high altitudes even in relatively small areas and harbor an extremely rich endemic flora, including notable examples of plant radiation, such as the genus Aeonium (ca. 41 taxa), Sonchus (ca. 31 taxa) and Echium (ca. 27 taxa). Considered a biodiversity hotspot, Macaronesia is recognized as a model for studying the evolutionary processes involved in flora diversification. Aeonium genus (Crassulaceae) includes about 41 taxa and is considered the most speciose radiation of Macaronesia, occupying many contrasting habitat types in the Canary Islands, Madeira and Cabo Verde. The great species richness and the wide range of characters observed in Aeonium species make it a model of study par excellence. This dissertation aimed to study the reproductive traits and cytogenomic variation patterns of Aeonium genus in order to understand the characters that influence the distribution of the most speciose radiation of Macaronesian Region. For these purposes, a holistic approach was used that integrates different methods in the areas of reproductive biology (Chapter 2), cytogenomics (Chapter 3) and conservation biology (Chapter 4), based on extensive fieldwork on the islands of the Canary Islands. The reproductive trait-based results (Chapter 2) showed that inflorescence height was positively correlated to flower number and geographic range size. This suggested that species that invest in taller inflorescences and more reproductive units have wider distributions and a more generalist behavior. According to the cytogenomic results (Chapter 3), Aeonium species tend to have small genomes, being subshrubs the large-genomed ones. Comparative analysis across the genus revealed a positive correlation between 2C-values and conservation status, owning endangered species, on average, large genomes. Finally, in a conservation approach (Chapter 4), most of Aeonium taxa occur in Tenerife in Teno Rural Park and Anaga Rural Parks, being there their hotspot of biodiversity. The representation of Aeonium endemics in the network of the Protected Areas is relatively high once a large area (40%) of Canary Islands is classified as protected. Thus, by integrating the knowledge of the various approaches applied in the three chapters (2 – 4) of this dissertation, it was possible to contribute with new data to explain the distribution of Aeonium and detect hotspots areas of species diversity, based on inflorescence height, genome size and abiotic factors. Some species have their limited range of occurrence, among other external factors (e.g., anthropogenic action and invasive species), by the reduced inflorescence height. On the other hand, species with a larger genome do not respond to this trend and have also limited dispersal ranges. However, further morphological, cytogenomic analyzes and more fieldwork in all Macaronesian Islands to inventory all Aeonium species will reinforce the results and identify the main factors leading to the large diversification of largest plant radiation of Macaronesia, contributing to the preservation of the unique biodiversity existing in these island ecosystems.Correia, Otília da Conceição Alves, 1953-Romeiras, Maria Manuel Cordeiro Salgueiro, 1968-Repositório da Universidade de LisboaBrilhante, Miguel Ângelo Filipe2021-10-30T00:30:26Z201920192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/41697TID:202379884enginfo: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:RCAAP2023-11-08T16:41:16Zoai:repositorio.ul.pt:10451/41697Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:54:56.400933Repositório 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 From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
title From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
spellingShingle From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
Brilhante, Miguel Ângelo Filipe
Conservação
Espécies endémicas insulares
Ilhas oceânicas
Tamanho do genoma
Traits reprodutivos
Teses de mestrado - 2019
Departamento de Biologia Vegetal
title_short From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
title_full From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
title_fullStr From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
title_full_unstemmed From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
title_sort From the flowers to the cells: a trait-based and cytogenomic study of Macaronesian Aeonium genus (Crassulaceae)
author Brilhante, Miguel Ângelo Filipe
author_facet Brilhante, Miguel Ângelo Filipe
author_role author
dc.contributor.none.fl_str_mv Correia, Otília da Conceição Alves, 1953-
Romeiras, Maria Manuel Cordeiro Salgueiro, 1968-
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Brilhante, Miguel Ângelo Filipe
dc.subject.por.fl_str_mv Conservação
Espécies endémicas insulares
Ilhas oceânicas
Tamanho do genoma
Traits reprodutivos
Teses de mestrado - 2019
Departamento de Biologia Vegetal
topic Conservação
Espécies endémicas insulares
Ilhas oceânicas
Tamanho do genoma
Traits reprodutivos
Teses de mestrado - 2019
Departamento de Biologia Vegetal
description Tese de mestrado, Biologia dos Recursos Vegetais, Universidade de Lisboa, Faculdade de Ciências, 2019
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019-01-01T00:00:00Z
2021-10-30T00:30:26Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/41697
TID:202379884
url http://hdl.handle.net/10451/41697
identifier_str_mv TID:202379884
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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
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