Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts

Detalhes bibliográficos
Autor(a) principal: Fernandes, Ana Margarida Marques
Data de Publicação: 2023
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/40934
Resumo: Some sea slugs from the group Sacoglossa have a particular ability known as kleptoplasty i.e., the capacity to “steal” and use chloroplasts (herein kleptoplasts) from the algae they eat. Kleptoplasts can remain functional for variable time span however, the time of the retain chloroplast can vary depending on the type of macroalgae they feed on. Moreover, the physiological aspects of the algae species have an impact on chloroplast maintenance. In this work five macroalgae species were studied concerning their different photosynthesis and photoprotection characteristics. Additionally, the physiology of Elysia viridis feeding on two different marcoalgae, Codium tomentosum and Bryopsis sp. was investigated. The results showed that sea slug diet had a great impact on growth rate and chloroplast maintenance. Also, Bryopsis sp. appeared to be a more favourable alternative food source to C. tomentosum, presenting better growth rates and photosynthetic activity during both feeding and starvation periods. Furthermore, the presence of photoprotective mechanisms was confirmed in three of the five species (Acetabularia acetabulum, Cladophora sp. and Vaucheria litorea) studied and it was showed the absence of a photoprotective mechanism in the Bryopsidales species C. tomentosum and Bryopsis sp..
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spelling Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplastsSacoglossa sea slugsFv/FmAlgaePhotosynthesisKleptoplastsSome sea slugs from the group Sacoglossa have a particular ability known as kleptoplasty i.e., the capacity to “steal” and use chloroplasts (herein kleptoplasts) from the algae they eat. Kleptoplasts can remain functional for variable time span however, the time of the retain chloroplast can vary depending on the type of macroalgae they feed on. Moreover, the physiological aspects of the algae species have an impact on chloroplast maintenance. In this work five macroalgae species were studied concerning their different photosynthesis and photoprotection characteristics. Additionally, the physiology of Elysia viridis feeding on two different marcoalgae, Codium tomentosum and Bryopsis sp. was investigated. The results showed that sea slug diet had a great impact on growth rate and chloroplast maintenance. Also, Bryopsis sp. appeared to be a more favourable alternative food source to C. tomentosum, presenting better growth rates and photosynthetic activity during both feeding and starvation periods. Furthermore, the presence of photoprotective mechanisms was confirmed in three of the five species (Acetabularia acetabulum, Cladophora sp. and Vaucheria litorea) studied and it was showed the absence of a photoprotective mechanism in the Bryopsidales species C. tomentosum and Bryopsis sp..Algumas lesmas do mar do grupo Sacoglossa, têm uma capacidade específica conhecida como cleptoplastia, ou seja, a capacidade de “roubar” e utilizar os cloroplastos (aqui denominados cleptoplastos) das algas que comem. Os cleptoplastos podem permanecer funcionais durante um período variável, mas o tempo de retenção dos cloroplastos pode variar consoante o tipo de macroalgas de que se alimentam. Além disso, os aspetos fotofisiológicos das espécies de algas têm um grande impacto na conservação dos cloroplastos. Neste trabalho, foram estudadas cinco espécies de macroalgas relativamente às suas diferentes características fotossintéticas e de fotoproteção. Além disso, foi investigada a fisiologia da lesma do mar Elysia viridis alimentada com duas macroalgas diferentes, Codium tomentosum e Bryopsis sp.. Os resultados mostraram que a dieta da E. viridis teve um grande impacto na sua taxa de crescimento e na manutenção dos cloroplastos. A macroalga Bryopsis sp. mostrou ser uma fonte de alimento alternativa mais favorável à alga C. tomentosum, no que respeita à taxas de crescimento e atividade fotossintética durante os períodos de alimentação e de fome. Além disso, a presença de mecanismos fotoprotetores foi confirmada em três das cinco espécies estudadas (Acetabularia acetabulum, Cladophora sp. e Vaucheria litorea) e foi demonstrada a ausência do mecanismo fotoprotetor nas espécies da ordem Bryopsidales, C. tomentosum e Bryopsis sp..2024-03-05T14:18:36Z2023-12-04T00:00:00Z2023-12-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/40934engFernandes, Ana Margarida Marquesinfo: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:RCAAP2024-03-11T01:46:50Zoai:ria.ua.pt:10773/40934Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:19:54.952578Repositório 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 Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
title Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
spellingShingle Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
Fernandes, Ana Margarida Marques
Sacoglossa sea slugs
Fv/Fm
Algae
Photosynthesis
Kleptoplasts
title_short Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
title_full Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
title_fullStr Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
title_full_unstemmed Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
title_sort Photophysiology of potential chloroplast macroalgal donors to the sea slug Elysia viridis and its kleptoplasts
author Fernandes, Ana Margarida Marques
author_facet Fernandes, Ana Margarida Marques
author_role author
dc.contributor.author.fl_str_mv Fernandes, Ana Margarida Marques
dc.subject.por.fl_str_mv Sacoglossa sea slugs
Fv/Fm
Algae
Photosynthesis
Kleptoplasts
topic Sacoglossa sea slugs
Fv/Fm
Algae
Photosynthesis
Kleptoplasts
description Some sea slugs from the group Sacoglossa have a particular ability known as kleptoplasty i.e., the capacity to “steal” and use chloroplasts (herein kleptoplasts) from the algae they eat. Kleptoplasts can remain functional for variable time span however, the time of the retain chloroplast can vary depending on the type of macroalgae they feed on. Moreover, the physiological aspects of the algae species have an impact on chloroplast maintenance. In this work five macroalgae species were studied concerning their different photosynthesis and photoprotection characteristics. Additionally, the physiology of Elysia viridis feeding on two different marcoalgae, Codium tomentosum and Bryopsis sp. was investigated. The results showed that sea slug diet had a great impact on growth rate and chloroplast maintenance. Also, Bryopsis sp. appeared to be a more favourable alternative food source to C. tomentosum, presenting better growth rates and photosynthetic activity during both feeding and starvation periods. Furthermore, the presence of photoprotective mechanisms was confirmed in three of the five species (Acetabularia acetabulum, Cladophora sp. and Vaucheria litorea) studied and it was showed the absence of a photoprotective mechanism in the Bryopsidales species C. tomentosum and Bryopsis sp..
publishDate 2023
dc.date.none.fl_str_mv 2023-12-04T00:00:00Z
2023-12-04
2024-03-05T14:18:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10773/40934
url http://hdl.handle.net/10773/40934
dc.language.iso.fl_str_mv eng
language eng
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instacron:RCAAP
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