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Flavonoid content and antimicrobial properties of leaves of some Begonia species

Karpova Evgeniya   (Central Siberian Botanical Garden SB RAS)

Fershalova Tatyana   (Central Siberian Botanical Garden SB RAS)

Yakimova Yuliya   (State Research Center of Virology and Biotechnology «Vector»)

Flavonoid content, including exudative flavonoids, in leaves, and antimicrobial activity of leaf exudates of three Begonia species were studied. Flavonoid contents in exudates of leaves were 106.2; 12.3 and 13.1 µg/g of dry weight for B. grandis, B. fischeri and B. malabarica, respectively, which were 0.04, 0.27 and 2.07 % of the total flavonoid contents in the leaves. The exudate of the leaves of B. fischeri contained significant contents of hyperoside and isoquercitrin showed activity against one of six test strains (Bacillus subtilis). The exudate of the leaves of B. malabarica with minute amounts of isovitexin, hyperoside and 3 unusual aglycons showed activity against two test strains (Bacillus subtilis and Staphilococcus aureus). Antimicrobial properties was shown to associate with the presence of O-glycosides and unusual flavonoid aglycones that forms the basis for prediction of antimicrobial properties of introduced species.

Keywords:antimicrobial activity, Begonia malabarica, Begonia fischeri, flavonoids, leaf exudate
 

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Citation link:
Karpova E. , Fershalova T. , Yakimova Y. Flavonoid content and antimicrobial properties of leaves of some Begonia species // Современная наука: актуальные проблемы теории и практики. Серия: Естественные и Технические Науки. -2018. -№01. -С. 5-10
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