Beet (Beta vulgaris) and Leek (Allium porrum) Leaves as a Source of Bioactive Compounds with Anti-quorum Sensing and Anti-biofilm Activity

The by-products resulted from the processing of raw vegetables contain sometimes appreciable amounts of bioactive compounds can be extracted, purified, concentrated and reused as antipathogenic agents. By altering the pathogenicity of microorganisms, the virulence of the pathogen is attenuated. The objective of this work is to analyze the antibacterial, anti-quorum sensing, anti-biofilm and antioxidant activity of Beta vulgaris (beet) and Allium porrum (leek) leaves as possible antipathogenic agents. The ethanolic extracts of dehydrated beet leaves (EEDBL) showed greater antioxidant activity and a higher concentration of polyphenols than those of ethanolic extract of dehydrated leek leaves (EEDLL). The EEDLL showed major antibacterial activity with a minimal inhibitory concentration (MIC) of 358.33 mg mL−1 and anti-quorum sensing activity at 53.75 mg mL−1 than the EEDBL. Moreover, the EEDLL showed anti-biofilm activity at 268.75 mg mL−1. The use of bioactives extracted from unused portions of different vegetables as antipathogenic substances it is proposed as an alternative to the use of traditional antibacterials.