Antioxidant and antibacterial activities and composition of Brazilian spearmint (Mentha spicata L.)

•The methanol extract has strong antioxidant activity.•The essential oil has good antimicrobial activity.•37 compounds were identified and carvone being the major compound in the oil. Antioxidant and antibacterial activities and the composition of Brazilian spearmint (Mentha spicata) extracts were e...

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Bibliographic Details
Published in:Industrial crops and products 2013-10, Vol.50, p.408-413
Main Authors: Scherer, Rodrigo, Lemos, Mayara Fumiere, Lemos, Mariana Fumiere, Martinelli, Gésika Coimbra, Martins, João Damasceno Lopes, da Silva, Ary Gomes
Format: Article
Language:English
Subjects:
AAI
acetone
antibacterial properties
Antimicrobial
antioxidant activity
DPPH
Escherichia coli
essential oils
maceration
Mentha spicata
methanol
minimum inhibitory concentration
Mint
phenolic compounds
Staphylococcus aureus
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Summary:•The methanol extract has strong antioxidant activity.•The essential oil has good antimicrobial activity.•37 compounds were identified and carvone being the major compound in the oil. Antioxidant and antibacterial activities and the composition of Brazilian spearmint (Mentha spicata) extracts were evaluated. They were obtained by maceration with methanol, acetone, and dichloromethane, and the essential oil was obtained by hydrodistillation. The antioxidant activity was determined by antioxidant activity index (AAI), and the antimicrobial activity was evaluated by the diffusion method and by determination of minimum inhibitory concentration against Staphylococcus aureus and Escherichia coli. Phenolic compounds were determined by the Folin–Cioucalteu method, and the essential oil composition was identified by GC/MS. The methanolic extract showed a higher content of total phenolic compounds and stronger antioxidant activity, while only the essential oil showed antibacterial activity. The major compounds of the essential oil were carvone (67%), limonene (14.3%), muurolene (2.3%), and myrcene (2.1%).
ISSN:0926-6690
1872-633X
DOI:10.1016/j.indcrop.2013.07.007