Biologically active substances of <i>Helichrysum italicum</i> (Roth) G.Don

Abstract

The article provides data on a comparative study of the content and component composition of essential oil, the total content of antioxidants and flavonoids of two cultivars and two promising cultivar samples of Italian strawflower ( Helichrysum italicum (Roth) G. Don) grown on the Southern Coast of the Crimea in the collection of aromatic and medicinal plants of the Nikitsky Botanical Gardens. It has been found that the content of essential oil in the green weight of top of H. italicum varies from 0.1% of the wet weight (‘Crystal’ cultivar) to 0.2 (cultivar No. 5). The main components of ‘VIM’ cultivar essential oil are α-pinene and D-limonene, of ‘Crystal’ cultivar is neril acetate, of the sample No. 5 is α-pinene and rosiforiol, of the sample No. 158 is neryl acetate and γ-turmeric. A significant relative content of β-diketones (38%) in the essential oil of ‘Crystal’ cultivar was noted. The greatest amount of antioxidants (2.59 mg / g (in conversion to quercetin) and flavonoids (0.366%) in the inflorescences of Italian strawflower ‘VIM’ cultivar is contained in the budding phase. The results of chromatographic analysis prove the presence of 4 phenolic substances in the inflorescences of Italian strawflower. UV-spectra of alcohol solutions of the studied raw materials had a maximum absorption at a wavelength of 418 ± 2nm. Quantitative determination of flavonoids by differential spectroscopy calculated as isosalipurposide showed that the content of flavonoids in inflorescences varies from 0.262% to 0.366% depending on a cultivar and a phase of vegetation.