Page 150 - Zbornik_Konf_2019

https://doi.org/10.15414/2019.9788055220703

4 International Scientific Conference Abstracts Book
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ANTIOXIDANT ACTIVITY OF ALIEN GALINSOGA SPECIES

Yulia Vinogradova , Olena Vergun , Olga Grygorieva , Ján Brindza
2
3
2
1
1 N.V. Tsitsin Main Botanical Garden of Russian Academy of Sciences, Botanicheskaya, Moscow, Russian
Federation; E-mail.: gbsad@mail.ru
2 M.M. Gryshko National Botanical Garden of the National Academy of Sciences of Ukraine
Kyiv, Ukraine
3 Slovak Agricultural University in Nitra, Nitra, Slovak Republic
So far only about 5 % of plants are widely cultivated as useful ones. That’s why the
searching for new resource plant species has worried the humanity. However, nowadays the
possibility of using the whole group of invasive species, whose secondary distribution range is
expanding year by year, has not been adequately studied. Alien invasive species may be used
as valuable sources of nutrients and they are particularly recognized for their antioxidant
properties. In this respect, the genus Galinsoga Ruiz & Pavón (Compositae: Heliantheae)
attracts attention. According to the modern revision, genus Galinsoga consists of two
American species: G. parviflora Cav. and G. quadriradiata Ruiz & Pavón (= G. ciliata (Raf.) S. F.
Blake. Both species became already invasive in Russia and are included in 'Top 100' of the
most aggressive invasive species. Galinsoga species are used in folk medicine as anti-
inflammatory agents and accelerators for wound healing. They also have reported antioxidant
activity.
We examined aqueous and alcoholic extracts derived from the Galinsoga as potential
antioxidants and compared 2 species, 2 habitats and 2 different organs of the plant. Four
specimens were included in the analysis: G. parviflora from Nesvizh, Belarus (GpN) and from
Moscow district, Russia (GpM); G. quadriradiata from Nesvizh, Belarus (GqN) and from
Moscow district, Russia (GqM). We collected separately leaves and inflorescences (heads)
from 10–20 plants per each population.
Free radical scavenging activity was measured by 2.2-diphenyl-1-picrylhydrazyl
(DPPH·) method according to Brand-Williams et al. (1995).
The total antioxidant activity of extracts from leaves for all specimens was quite high
and had 53.63–80.45 % (methanol extracts), 78.07–93.23 % (ethanol extracts) and 59.87–
88.36 % (aqueous extracts). The total antioxidant activity of extracts from heads is higher for
methanol extracts and had 77.89–85.54 %, but lower in the other cases: 36.19–86.85 %
(ethanol extracts) and 24.38–49.06 % (aqueous extracts). The lowest antioxidant activity in
alcohol extracts from heads was shown by Gq, and the highest one by Gp. Conversely, aqueous
extracts from heads have the lowest antioxidant activity in GqM and the highest one in GqN.
The total antioxidant activity of alcoholic extracts from dry leaves was highest for GpM;
aqueous extracts from leaves for all 4 specimens were equal.
Thus, our results demonstrate a broad reaction norm of phytochemical characteristics
within the invasive populations of both G. parviflora and G. quadriradiata. Our observations
suggest that invasive Galinsoga taxa have a potential source of useful bioactive compounds.

Keywords: Galinsoga, antioxidant activity, invasive species.
Acknowledgments
This work was carried out in accordance with the MBG RAS Research Project (118021490111-5) and
National Scholarship Programme of the Slovak Republic.

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September 11–13, 2019