Bitter Gentian Teas: Nutritional and Phytochemical Profiles, Polysaccharide Characterisation and BioactivityReport as inadecuate




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1

Institute of General and Experimental Biology, Siberian Division, Russian Academy of Science, Sakh’yanovoy Str., 6, Ulan-Ude 670047, Russia

2

Department of Biochemistry and Biotechnology, North-Eastern Federal University, 58 Belinsky Str., Yakutsk 677027, Russia

3

Faculty of the Veterinarian Medicine, Yakut State Agricultural Academy, 15 Krasil’nikova Str., Yakutsk 677007, Russia





*

Author to whom correspondence should be addressed.



Academic Editor: Christopher Lam

Abstract As a result of the wide distribution of herbal teas the data on nutritional characterisation, chemical profile and biological activity of these products are required. The decoctions of Gentiana algida, G. decumbens, G. macrophylla and G. triflora herb teas were nutritionally characterized with respect to their macronutrients, demonstrating the predominance of polysaccharides and low lipid content. Gentian decoctions were also submitted to a microcolumn RP-HPLC-UV analysis of phytochemicals demonstrating a high content of iridoids 177.18–641.04 μg-mL and flavonoids 89.15–405.71 μg-mL. Additionally, mangiferin was detected in samples of G. triflora tea 19.89 μg-mL. Five free sugars fructose, glucose, sucrose, gentiobiose, gentianose were identified in all gentian teas studied, as well as six organic acids malic, citric, tartaric, oxalic, succinic, quinic. Pectic polysaccharides with a high content of rhamnogalacturonans and arabinogalactans were also identified and characterized in gentian decoctions for the first time. Gentian tea decoctions and their specific compounds gentiopicroside, loganic acid-6′-O-β-d-glucoside, isoorientin, isoorientin-4′-O-β-d-glucoside, mangiferin, water-soluble polysaccharides showed a promising antimicrobial, anti-inflammatory and antioxidant potentials. Evidences obtained indicate the prospective use of gentian herb teas as food products and medicines. View Full-Text

Keywords: Gentiana algida; Gentiana decumbens; Gentiana macrophylla; Gentiana triflora; iridoids; flavonoids; polysaccharides; anti-inflammatory; antioxidant; antimicrobial activity Gentiana algida; Gentiana decumbens; Gentiana macrophylla; Gentiana triflora; iridoids; flavonoids; polysaccharides; anti-inflammatory; antioxidant; antimicrobial activity





Author: Daniil N. Olennikov 1,* , Nina I. Kashchenko 1, Nadezhda K. Chirikova 2, Lena P. Koryakina 3 and Leonid N. Vladimirov 3

Source: http://mdpi.com/



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