Photoprotection and antioxidative metabolism in Ulva lactuca exposed to coastal oceanic acidification scenarios in the presence of Irgarol

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de São Paulo (UNIFESP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorSousa, Gabriela Tavares [UNESP]-
Autor(es): dc.creatorLima Neto, Milton C. [UNESP]-
Autor(es): dc.creatorChoueri, Rodrigo Brasil-
Autor(es): dc.creatorCastro, Italo Braga-
Data de aceite: dc.date.accessioned2022-02-22T00:57:41Z-
Data de disponibilização: dc.date.available2022-02-22T00:57:41Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.aquatox.2020.105717-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209811-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209811-
Descrição: dc.descriptionAnthropogenic changes such as ocean acidification, eutrophication, and the release of hazardous chemicals affect coastal environments and aquatic organisms. We investigated the effects of seawater pH (7.4 and 8.2) isolated and in combination with Irgarol on Ulva lactuca. Stress indicators such as membrane damage, lipid peroxidation, and hydrogen peroxide content were assessed. In addition, chlorophyll fluorescence and antioxidant enzyme activities were measured. The photosynthetic yield was affected by low pH in assays with and without Irgarol. However, the combination of low pH and Irgarol promoted photoinhibition, besides the induction of nonphotochemical quenching (NPQ) and changes in photosynthetic pigment contents. The induction of NPQ was directly influenced by low pH. The membrane damage was increased in low pH with and without Irgarol exposure. Total soluble protein and carbohydrate contents decreased in low pH, and in presence of Irgarol. The H2O2 content and lipid pemxidation were not affected by low pH. In contrast, Irgaml exposure strongly increased lipid peroxidation in both pHs, suggesting a possible synergistic effect. To avoid the harmful effects of high H2O2, U. lactuca increased antioxidant enzyme activities in treatments under low pH and in presence of Irgaml. Our results indicate that U. lactuca is tolerant to low pH by inducing NPQ, changing pigment contents, and increasing antioxidant defenses. In contrast, these protective mechanisms could not avoid the harmful effects of the combination with Irgaml.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionUniv Fed Sao Paulo, Inst Mar, Rua Maria Maximo 168, BR-11030400 Santos, SP, Brazil-
Descrição: dc.descriptionState Univ Sao Paulo, Biosci Inst, Coastal Campus,Praca Infante Dom Henrique S-N, BR-11330900 Sao Vicente, SP, Brazil-
Descrição: dc.descriptionState Univ Sao Paulo, Biosci Inst, Coastal Campus,Praca Infante Dom Henrique S-N, BR-11330900 Sao Vicente, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2018/0458-6-
Descrição: dc.descriptionCNPq: 423583/2018-2-
Descrição: dc.descriptionCAPES: 001-
Descrição: dc.descriptionCNPq: PQ 302713/2018-2-
Descrição: dc.descriptionCNPq: PQ 301766/2019-3-
Formato: dc.format9-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationAquatic Toxicology-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectAntioxidant metabolism-
Palavras-chave: dc.subjectPhotosynthesis-
Palavras-chave: dc.subjectTriazine-
Palavras-chave: dc.subjectNPQ-
Palavras-chave: dc.subjectOcean acidification-
Título: dc.titlePhotoprotection and antioxidative metabolism in Ulva lactuca exposed to coastal oceanic acidification scenarios in the presence of Irgarol-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.