Abstract

Oxytropis pseudoglandulosa is used in Mongolian traditional medicine due to its numerous reported health-promoting effects. To date, there are very few scientific reports that describe this species. In this article, its volatile oil composition, lipid extract composition, total phenolic and flavonoid content, antibacterial and allergenic properties are elucidated for the first time. Hexadecanoic acid, fokienol and tricosane were determined as the most notable components of the volatile oil, at 13.13, 11.46 and 5.55%, respectively. Methyl benzoate was shown to be the most abundant component of lipid extract at 40.69, followed by (E)-prop-2-enoic acid, 3-phenyl- and benzenepropanoic acid, at 18.55 and 9.97%. With a TPC of 6.620 mg GAE g−1 and TFC of 10.316 mg QE g−1, the plant extract of O. pseudoglandulosa indicated good antioxidant activity measured by IC50 at 18.761 µg mL−1. Of the 12 tested microorganisms, B. subtilis and S. cerevisiae were the shown to be most susceptible to the plant extract, with MIC at 2.081 and 0.260% (v/v), respectively. Bet v 1—a major birch pollen allergen found in plant-based foods—was determined to be at 192.02 ng g−1 with ELISA. Such a wide spectrum of biological activity indicated by O. pseudoglandulosa lends credence for its application in food industry. Its exerted antioxidant and antimicrobial effects could improve preservation of low-processed food dedicated for consumers afflicted with allergies. Hexadecanoic acid supplemented in foods with dietary plant extracts could add to the potential anti-inflammatory impact. The analysis of lipid makeup suggests O. pseudoglandulosa extract could also be considered as natural pesticide in organic farming.

Highlights

  • The Oxytropis genus consists of over 300 species, nearly half of which are considered native to the territory of China [1]

  • In this study we report on the chemical composition of volatile oil and lipid extracts of O. pseudoglandulosa plant species as well as its total phenolic and flavonoid content, antimicrobial properties and allergenicity

  • Total phenolic content was determined in O. pseudoglandulosa at 6.620 mg GAE g−1

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Summary

Introduction

The Oxytropis genus consists of over 300 species, nearly half of which are considered native to the territory of China [1]. More than 90% of these are found in the Siberian forest taiga with many of them being endemic species. Owing to their high adaptability, they can be located in diverse types of environment marked by continental climate, such as grasslands, woodlands, prairies, and swamps [2]. Sources published a decade ago report over 127 chemical components isolated from genus Oxytropis, including i.a. flavonoids, flavonones, chalcones, isoflavones, isoflavanones, dihydroflavones, alkaloids, saponins, or lignans, all of which can be attributed biological and pharmacological activities [3]. In this study we report on the chemical composition of volatile oil and lipid extracts of O. pseudoglandulosa plant species as well as its total phenolic and flavonoid content, antimicrobial properties and allergenicity. Despite the long history of this natural remedy, this is the first time scientific data is published on the chemical compounds underlying its medicinal application

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