Please use this identifier to cite or link to this item:

Title: Acute toxicity of plant extracts towards Daphnia magna
Authors: Ferraz, C
Pais, RT
Gaspar, C
Palmeira de Oliveira, A
Sousa, AC
Pastorinho, M. Ramiro
Issue Date: Nov-2019
Citation: Ferraz C, Pais RT, Gaspar C, Palmeira de Oliveira A, Sousa AC, Pastorinho MR (2019) Acute toxicity of plant extracts towards Daphnia magna. III International Congress in Health Sciences Research – Trends in Aging and Cancer, 14-16 November 2019, Covilhã, Portugal, p. 89
Abstract: The demand for natural based products for the cosmetics industry is increasing sharply and therefore the search for new alternatives to the traditionally used plants is growing. These alternative plants can be an important source of bioactive compounds under a circular economy approach. Within the framework of Inovep project, several plant species, some of which autochthonous from Portugal, were identified as potential sources of bioactive compounds, namely: gum rockrose (Cistus ladanifer), curry plant (Helichrysum italicum), hop (Humulus lupulus), Mediterranean thyme (Thymbra capitata) and basil (Ocimum basilicum). Considering the potential future use of these plant extracts by the industry, it is necessary to assess the risk associated with their introduction into the ecosystem. This work aims to evaluate the toxic effects of different extracts of these five species. Acute toxicity tests using the model organism Daphnia magna were performed and the immobilization after 24 and 48 hours of exposure was evaluated. The EC50 (the concentration estimated to immobilize 50 per cent of the Daphnia) varied from 201.8±3.28 x10-5 mg.L-1 at 24 hours and 199.5±5.9410x10-5 mg.L-1 at 48 hours for Cistus ladanifer extract and 11.2±0.2403 mg.L- 1 at 24 hours and 11.2±0.4095 mg.L-1 at 48 hours for Thymbra capitata essential oil. For Humulus lupulus, Helichrysum italicum, Thymbra capitata in the form of hidrolate, and Ocimum basilicum no immobilization was observed until the highest concentrations tested for various types of extracts, suggesting these extracts present low to no risk towards D. magna.
Type: lecture
Appears in Collections:BIO - Comunicações - Em Congressos Científicos Internacionais

Files in This Item:

File Description SizeFormat
Abstract Book Ferraz et al 2019.pdf309.8 kBAdobe PDFView/Open
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Dspace Dspace
DSpace Software, version 1.6.2 Copyright © 2002-2008 MIT and Hewlett-Packard - Feedback
UEvora B-On Curriculum DeGois