The pharmacognostic study of some species of the genus poplar (Populus L.) growing in the Samara Region

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Abstract

About 30 species of poplar (Populus L.) grow on the territory of the Russian Federation, however only five of them are pharmacopoeial. The buds of pharmacopoeial poplar species are used as medicinal plant raw materials. The chemical composition of the buds is quite diverse, the leading group is flavonoids (about 30%). The flavanones like pinostrobin (5-hydroxy-7-methoxyflavanone) and pinocembrin (5,7-dihydroxyflavanone) are diagnostically significant for the representatives of the genus Populus. Along with pharmacopoeia species, poplar hybrids are promising for study and further use, they have a number of advantages. One of such promising species is Populus rubrinervis Hort. Alb. The composition of the buds of Populus rubrinervis hasn’t been studied yet. As a result of the conducted studies, we found phenolic compounds, presumably flavonoids, in the composition of both the buds of Populus rubrinervis and pharmacopoeia species with the use of thin-layer chromatography and spectrophotometry.

About the authors

Elena A. Urbanchik

Samara State Medical University

Author for correspondence.
Email: e.a.kupriyanova@samsmu.ru

Candidate of Pharmaceutical Sciences, Assistant, Department of Pharmacology named after Professor A.A. Lebedev

Russian Federation, Samara

Vladimir A. Kurkin

Samara State Medical University

Email: v.a.kurkin@samsmu.ru

Doctor of Pharmaceutical Sciences, Professor, Head of the Department of Pharmacognosy with Botany and Bases of Phytotherapy

Russian Federation, Samara

Albert I. Agapov

Samara State Medical University

Email: a.i.agapov@samsmu.ru

Doctor of Biological Sciences, Professor, Professor of the Chair of Medical Chemistry

Russian Federation, Samara

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Supplementary files

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2. Fig. 1. Structural formula of pinostrobin

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3. Fig. 2. Structural formula of pinocembrin

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4. Fig. 3. Chromatogram of the analysis of the alcohol extraction from Populus buds in the system of solvents chloroform/ethanol (9:1): a — detection in UV-light at the wavelength of 366 nm; b — detection in UV-light at the wavelength of 254 nm. Samples of extractions on 96% ethyl alcohol: 1 — buds of Populus nigra; 2 — buds of Populus rubrinervis; 3 — pinostrobin; 4 — rutin; 5 — quercetin; 6 — luteolin

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5. Fig. 4. Electronic spectra of alcohol extractions from Populus buds: 1 — extraction from the buds of Populus rubrinervis; 2 — extraction from the buds of Populus nigra; 3 — solution of a reference standard of pinostrobin

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Copyright (c) 2021 Urbanchik E.A., Kurkin V.A., Agapov A.I.

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