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Open AccessArticle

Antioxidant and Antibacterial Activity of Roseroot (Rhodiola rosea L.) Dry Extracts

1
Laboratory of New Herbal Products, Department of Vegetable and Medicinal Plants, Faculty of Horticulture, Biotechnology and Landscape Architecture, Warsaw University of Life Sciences SGGW, 02-776 Warsaw, Poland
2
Division of Food Biotechnology and Microbiology, Department of Biotechnology, Microbiology and Food Evaluation, Faculty of Food Sciences, Warsaw University of Life Sciences SGGW, 02-776 Warsaw, Poland
3
Dipartimento di Scienze Biomediche, Odontoiatriche, e Delle Immagini Morfologiche e Funzionali (BIOMORF), University of Messina, 98122 Messina, Italy
4
Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali (ChiBioFarAm), University of Messina, 98122 Messina, Italy
5
Chromaleont s.r.l., a Start-Up of the University of Messina, 98122 Messina, Italy
*
Author to whom correspondence should be addressed.
Molecules 2018, 23(7), 1767; https://doi.org/10.3390/molecules23071767
Received: 26 June 2018 / Revised: 13 July 2018 / Accepted: 17 July 2018 / Published: 18 July 2018
(This article belongs to the Special Issue The Antioxidant Capacities of Natural Products)
Roseroot (Rhodiola rosea L.) belongs to plants revealing adaptogenic properties, which are attributed to the presence of specific phenolic compounds and are reflected mainly as antioxidant activity. The aim of the present study was to determine the antioxidant and antibacterial activity of various products obtained from R. rosea (underground organs as well as their aqueous and ethanolic dry extracts) in relation to the chemical profiles of phenolic and essential oil compounds. The chemical profiles were determined by High-performance Liquid Chromatography with a diode-array detector (HPLC-DAD) and Gas chromatography-mass spectrometry (GC-MS), antioxidant activity by (1,1-Diphenyl-2-picrylhydrazyl) Scavenging Capacity Assay (DPPH), (2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)) Scavenging Capacity Assay (ABTS) and Ferric Reducing Antioxidant Power Assay (FRAP) and antimicrobial properties were expressed as minimum inhibitory concentration (MIC) and minimum bacterial concentration (MBC) values following the broth microdilutions method. The results show that the investigated samples differed in terms of their chemical compositions and biological activities. The extracts were more abundant in phenolic compounds (salidroside, tyrosol, and rosavin derivatives) in comparison to dried underground organs. The content of the determined phenolics in the analyzed extracts was affected by the solvent used for extraction. The ethanolic extract was characterized by the highest content of these substances in comparison to the aqueous one and the dried raw material, especially with regard to rosavin (969.71 mg/100 g). In parallel, this extract showed the strongest antioxidant and antibacterial activity. However, dried R. rosea underground organs also revealed strong antibacterial effects against, for example, Staphylococcus strains. View Full-Text
Keywords: roseroot; underground organs; dry extracts; salidroside; rosavins; essential oil; geraniol; antioxidant power; antibacterial activity roseroot; underground organs; dry extracts; salidroside; rosavins; essential oil; geraniol; antioxidant power; antibacterial activity
MDPI and ACS Style

Kosakowska, O.; Bączek, K.; Przybył, J.L.; Pióro-Jabrucka, E.; Czupa, W.; Synowiec, A.; Gniewosz, M.; Costa, R.; Mondello, L.; Węglarz, Z. Antioxidant and Antibacterial Activity of Roseroot (Rhodiola rosea L.) Dry Extracts. Molecules 2018, 23, 1767.

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