The content of flavonoids in Cosmos sulphureus

Flavonols, anthocyanins, and chalcones were determined during the flowering phase in two genotypes of Cosmos sulphureus (regular species its cultivar ‘Cosmic Orang’) grown М.М. Gryshko National Botanical Garden Kyiv. Inflorescences, leaves, stems, roots, separated ray disc florets dried crushed to prepare extracts following three different techniques. In particular, with 80 % (v/v) ethanol Andreeva & Kalinkina (2000), 3.5 HCl Kriventsov (1982), 0.1 N Udovenko (1988). The absorbance flavonoids was measured at 390 nm wavelength for flavonols, 530 – 364 chalcones. highest content flavonols found inflorescences both (87.79 ± 1.64 87.99 1.75 mg / 100 g dry weight (DW), respectively). anthocyanins be ranked by overground organs: > leaves stems. these 188.95 5.20 177.14 6.81 DW, respectively. 61.32 1.97 41.33 2.27 31.63 1.16 25.31 0.95 not detected. Among flavonoids, content, general, anthocyanins. Similarly, also localized organs only mostly (39.65 1.25 37.93 0.88 stems much lower than flavonols; it significantly varied investigated genotypes. During detailed investigation parts inflorescence, that had fewer florets.