Antioxidant and Anti-quorum Sensing Potential of Acer monspessulanum subsp. monspessulanum Extracts.

In this study, anti-quorum sensing, and antioxidant activities, and chemical composition of subsp. extracts were evaluated. Determination of the antioxidant activity was revealed by DPPH radical scavenging activity, the total phenolic content assay, and the -carotene/linoleic acid assay. The detection of phenolic compounds was determined using RP-HPLC. Anti-quorum sensing activity and violacein inhibition activity were determined using CV026 and ATCC 112 472, respectively. The determination of anti-swarming activity was carried out with PA01. In DPPH and total phenolic content assays, the water extract exhibited good antioxidant activity. In the -carotene-linoleic acid assay, ethyl acetate and ethanol extracts exhibited good lipid peroxidation inhibition activity, demonstrating 96.95 ± 0.03 % and 95.35 ± 0.00 % at 2.5 mg/mL concentrations, respectively. The predominant phenolic compounds of the extracts were determined as rutin, naringin, catechin hydrate, quercetin, and protocatechuic acid. Ethyl acetate and ethanol extracts were found to contain a high level of violacein inhibition and anti-quorum sensing activity. The ethanol extract also showed weak anti-swarming activity. In this first study that used subsp. extracts, it was revealed that the water extract has antioxidant activity and the ethanol and ethyl acetate extracts have anti-quorum sensing activity depending on the phenolic compounds that it contained.