Document details

Exposição e acumulação de elementos potencialmente tóxicos em manjericão (Ocimum basilicum)

Author(s): Montez, Ana Catarina Marques

Date: 2014

Persistent ID: http://hdl.handle.net/10400.5/6785

Origin: Repositório da UTL

Subject(s): basil; Ocimum basilicum; cadmium; copper; arsenic; salinity


Description

In this project the effects of the exposure of basil (Ocimum basilicum) to potentially toxic elements (PTE) were studied as well as the effects of salinity, through the analysis of different parameters such as biomass, dry matter and chlorophyll contents and mineral composition. Basil with 20 days growth was exposed to solutions containing Cd, Cu, As and NaCl. The exposure to As and NaCl led to a significant decrease in the quantity of biomass and it evidenced a high sensibility to salinity. Only the leaves contaminated with Cd showed a considerable decreased in the dry matter content, when compared to the control samples. Additionally, the plants exposed to Cd showed visible changes in the leaves pigmentation (chlorosis), which were verified by the Hansatech equipment. It was observed an accumulation of PTEs in the edible part of the plants, which showed higher contamination levels than the ones established by law for horticulture products after 52 days, especially for Cd and As. The concentration of the essential metal Cu only exceeded the limits established by law after 73 days of exposure and this was only observed in samples contaminated by Cu

Mestrado em Engenharia Alimentar - Qualidade e Segurança Alimentar - Instituto Superior de Agronomia

Document Type Master thesis
Language Portuguese
Advisor(s) Mourato, Miguel Barbosa
Contributor(s) Montez, Ana Catarina Marques
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