Antioxidant and antimicrobial activity and potential of heather ( Erica spp.) extracts in the control of Listeria monocytogenes
- CICS‐UBI‐Centro de Investigação em Ciências da Saúde Universidade da Beira Interior 6200 ‐ 506 Covilhã Portugal
Summary In this work, heather and its flowers were studied regarding their antioxidant and antimicrobial activities. Plants were subjected to ultrasound‐assisted methanolic extraction followed by fractionation. A phytochemical characterisation of extracts content in total phenols and flavonoids, and their antioxidant activity was performed. The antimicrobial activity was evaluated through the determination of minimum inhibitory concentration and by bioautography. Following, studies on the antilisterial potential were carried out by: time‐kill curves, inhibition of biofilm formation and tolerance of Listeria monocytogenes to adverse conditions. The results evidenced the antioxidant activity in both extracts, as well as, the antimicrobial activity against Gram‐positive bacteria. Concerning the evaluation of the antilisterial potential, a bacteriostatic behaviour and inhibition of biofilms formation ability were observed. Listeria monocytogenes showed an increased susceptibility to adverse conditions when preincubated with extracts. Thus, heather and its flowers may be a source of new compounds with antilisterial activity potential.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1480545
- Journal Information:
- International Journal of Food Science and Technology, Journal Name: International Journal of Food Science and Technology Vol. 54 Journal Issue: 3; ISSN 0950-5423
- Publisher:
- Wiley-BlackwellCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Web of Science
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