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Advisor(s)
Abstract(s)
Under stress, human body produce more reactive oxygen and nitrogen species
(ROS/RNS) than enzymatic antioxidants and non-enzymatic antioxidants (e.g., vitamin
C, vitamin E, glutathione, carotenoids, and flavonoids), causing an imbalance that may
lead to cell damage and health problems [1]. Antioxidants can block the complex
networks of oxidative damage pathways at different levels, yielding an overall
therapeutic effect. Consequently, antioxidants that are exogenously acquired from diet
may have important functions in redox cell homeostasis and can be important for
cellular function and disease prevention [2]. Antioxidant compounds might be isolated
and characterized from different plant parts like roots, stem, bark, leaves, flowers, fruits
and seeds [3].
Herein, different polar extracts (water, ethanol and water:ethanol 1:1) obtained from the
green parts and three floral stages of Coleostephus myconis (Asteraceae) were evaluated
for their antioxidant activity, using different in vitro chemical and biochemical assays.
All the studied botanical parts showed high antioxidant potential, either considering
their reducing power, radical scavenging activity and lipid peroxidation inhibition.
Independently of the studied botanical part or antioxidant assay, the hydro-alcoholic
extract gave the best results. Furthermore, significant differences were detected among
the green parts and each of the flowering stages. In conclusion, the results highlighted
the possibility of using C. myconis as a potential source of bioactive compounds with
several possible application.
Description
Keywords
Citation
Bessada, Sílvia; Barreira, João C.M.; Ferreira, Isabel C.F.R.; Oliveira, M.B.P.P. (2015). Antioxidant activity of polar extracts from different botanical parts of Coleostephus myconis. In 8th Meeting of Young Researchers of University of Porto