The composition and content of flavonoid aglycons and the composition of phenolic compounds (PhC) in Astragalus rytyensis Stepantsova, A. austrosibiricus Schischk, A. inopinatus Boriss., A. versicolor Pall. from the places of co-growth on the North-Western coast of lake Baikal by the method of high-performance liquid chromatography (HPLC). Luteolin and apigenin (the flavone aglycones) detected in hydrolysed extracts of leaves of A. rytyensis, along with the flavonol aglycons (quercetin, kaempferol, isorhamnetin), common to the studied species. A. rytyensis has significant differences of from other growing together Astragalus species on the contents of quercetin, away A. austrosibiricus – A. inopinatus – on the content of isorhamnetin and sum of flavonols. The composition of PhC water-alcohol extracts A. rytyensis differs from the composition of PhC A. versicolor and from the group A. austrosibiricus – A. inopinatus, although it has common components. Chlorogenic acid is detected in A. rytyensis and A. austrosibiricus, quercitrin in large quantity is in A. rytyensis and small – from A. versicolor. Hyperoside, isoquercitrin, rutin and astragalin is characteristic of A. rytyensis, A. austrosibiricus and A. inopinatus. The dendrogram constructed according to the 38 components of the phenolic complex showed the greatest similarity between the coenopopulations of A. rytyensis and A. versicolor. Studied differences in the composition and content of flavonoid aglycons in the hydrolysates and differences in the composition of PhC in non-hydrolysed extract contribute to the proof of the independence of the new taxon A. rytyensis and its isolation from A. versicolor, A. inopinatus and A. austrosibiricus vegetating jointly with the above species.

Kotsupiy Ol’ga Viktorovna, Candidate of Sciences (Biology), Research Scientist, Central Siberian Botanical Garden SB RAS, 101, Zolotodolinskaya st., Novosibirsk, 630090, Russian Federation, tel.: (383) 339–98–18, e-mail: olnevaster@gmail.com 

Stepantsova Nadezhda Vasilyevna, Candidate of Sciences (Biology), Leading Engineer, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, tel.: (3952) 24–18–70, e-mail: nadia@irk.ru 

Vysochina Galina Ivanovna, Doctor of Sciences (Biology), Head of Laboratory, Chief Research Scientist, Central Siberian Botanical Garden SB RAS, 101, Zolotodolinskaya st., Novosibirsk, 630090, Russian Federation, tel.: (383) 339–98–10, e-mail: vysochina_galina@mail.ru 

Petruk Anastasia Andreevna, Candidate of Sciences (Biology), Research Scientist, Central Siberian Botanical Garden SB RAS, 101, Zolotodolinskaya st., Novosibirsk, 630090, Russian Federation, tel.: (383) 339–98–18, e-mail: pet.a@mail.ru

Kotsupiy O.V., Stepantsova N.V., Vysochina G.I., Petruk A.A. Phenolic Compounds in Astragalus rytyensis Stepantsova and Other Species of the Astragalus L. Genus from Joint Growth Places on the North-Western Coast of Lake Baikal. The Bulletin of Irkutsk State University. Series Biology. Ecology, 2018, vol. 24, pp. 3-15. https://doi.org/10.26516/2073-3372.2018.24.3 (in Russian)

phenolic compounds, flavonoids, flavonols, flavons, aglycones, A. rytyensis Stepantsova, Astragalus austrosibiricus Schischk., A. inopinatus Boriss., A. versicolor Pall., coast of Baikal

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