Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5338
Título: Efeito da exposição e acumulação de elementos potencialmente tóxicos e salinidade em alface (Lactuca sativa)
Autor: Lamas, Mariana Beirão da Cunha
Orientador: Martins, Maria Luísa Louro
Mourato, Miguel Barbosa
Palavras-chave: Lactuca sativa
oxidative stress
phytotoxicity
potentially toxic elements
salinity
Data de Defesa: 2012
Editora: ISA/UTL
Citação: Lamas, M.B.C. - Efeito da exposição e acumulação de elementos potencialmente tóxicos e salinidade em alface (Lactuca sativa). Lisboa: ISA, 2012, 99 p.
Resumo: In this work the response of lettuce (Lactuca sativa) to oxidative stress induced by potentially toxic elements (PTE) and NaCl was evaluated. In the germination and growth assays Cd, As, Cu, Mn, Zn (0-500 μM) and NaCl (0-500 mM) was applied separately for assessing the germination rate and growth for 2 weeks. The germination rate was affected only by Cu, Zn and NaCl. Biomass and tolerance index were affected at the higher concentrations of all PTE and NaCl. In irrigation assays, solutions containing Cd, As, Cu and NaCl were applied separately. The number of leaves, biomass, dry matter content, chlorophyll content mineral composition were determined. The application of Cd and NaCl led to a decrease in the number of leaves and in all experiments there was a significant reduction in biomass and chlorophyll in contaminated plants. The application of NaCl led to an increase in dry matter content and the plants were visibly affected. There was accumulation of PTE and of Na in all the plants growing in the contaminated medium, exceeding legal limits for Cd and As, so their intake can be a hazard to human health.
Descrição: Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/5338
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
DISSERTAÇÃO.pdf3,04 MBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.