Sideritis montana L.: Antioxidant properties of extracts of different polarity All rights reserved https://unilib.phaidrabg.rs/o:5948 ISBN: 978-86-80877-67-9 info:eu-repo/semantics/conferenceProceedings Plants have specific chemical composition which depends on plant species, habitat and series of environmental factors. Several studies have confirmed link between pollution and plants metabolism, which means changes in productions of some compounds, caused by permanently exposure to pollutants. The aim of this research is examination of antioxidant activity, total phenol and total flavonoid content in Sideritis montana from 3 localities: Kravlje, Gornje Polje (mine depot) and Rogoška čuka, after wildfire site. S. montana is very rich in phenolic compounds with very strong biological activity, and is commonly used because of the antispasmodic, carminative and antimicrobial effects. For estimation of antioxidant activities- DPPH, ABTS, CUPRAC and total reducing power of ferrous assays were used (TRP). Determination of total phenols content was done by Folin-Ciocalteau assay, and determination of total flavonoids was performed using AlCl3 test. Antioxidant activity of plant S. montana was examined for extracts of different polarity (methanol, acetone, hexane). Methanol extracts of plant from mine depot and after wildfire site (showed the best activity (DPPH, ABTS, CUPRAC and TRP) and the highest phenols and flavonoids content versus the one which grew in unpolluted area.The same trend was followed by other examined extracts, while hexane extracts have the smallest antioxidant activity. eng Abstracts 13th Symposium on the Flora of Southeastern Serbia and Neighboring Regions, Stara planina Mt. 20 to 23 June 2019 Niš-Belgrade Department of Biology and Ecology; Faculty of Sciences and Mathematics, University of Niš; Institute for Nature Conservation of Serbia application/pdf 7065049 bytes Ilić, Marija Marković, Marija Mitić, Violeta Dimitrijević, Marija Stojanović, Gordana Stankov-Jovanović, Vesna 2019