Zbornik Matice srpske za prirodne nauke 2019 Issue 136, Pages: 155-164
https://doi.org/10.2298/ZMSPN1936155K
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Antioxidant potential of ragweeds: Ambrosia artemisiifolia, A. trifida and Iva xanthifolia
Kiprovski Biljana M. (Institute of Field and Vegetable Crops, Novi Sad, Serbia)
Malenčić Đorđe R. (University of Novi Sad, Faculty of Agriculture, Novi Sad, Serbia)
Luković Jadranka Ž. (University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Novi Sad, Serbia)
Boža Pal P. (University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Novi Sad, Serbia)
The purpose of this study was to analyze antioxidant systems among three
invasive ragweed species, Ambrosia artemisiifolia L., A. trifida L. and Iva
xanthifolia Nutt. Antioxidant capacity could be a possible marker of
adaptation to variable environmental conditions, since change in amount of
antioxidants represents one of the first responses to various environmental
stimuli. Among investigated ragweeds, I. xanthifolia leaves had more
pronounced guaiacol peroxidase activity (87.5 and 62.5%) and reduced
glutathione content (2.3 and 28.8%) than A. artemisiifolia and A. trifida,
respectively. However, superoxide dismutase activity was invariable in all
investigated plants (234.1-247.5 U g-1 fresh weight). The highest content of
total phenolics, tannins, flavonoids and proanthocyanidins were detected in
A. trifida leaves (up to 3.7 - fold the amount of the others). According to
antioxidant activity tests, investigated ragweed species could be presented
in a scale: A. trifida > I. xanthifolia > A. artemisiifolia. Accumulation of
non-enzymatic antioxidants and lower content of reduced glutathione point to
different oxidative stress avoidance strategies of A. trifida when compared
to A. artemisiifolia and I. xanthifolia within the same environmental
conditions.
Keywords: antioxidants, phenolics, ragweed, secondary metabolism