stains at reasonably low concentrations (MIC = 187.5–375 lg/ml).
The high phenolic content in some ethanol extracts also exhibiting
high antimicrobial and/or antioxidant activities suggested that the
presence of phenolic compounds might play an important role in
these properties. Further investigations on the presence of phenolics
using UPLC–MS/MS analysis present revealed that some ethanol
extracts with high antioxidant activity also contained large
amounts of chlorogenic acid, while in the corresponding water
extracts this compound was significantly less abundant. Significant
levels of caffeic acid were also present in ethanol extracts of C.
arvense, C. palustre and C. nigra. The ethanol extract of A. minus
was the only extract in the present study which contained rosmarinic
acid, a compound which has previously been reported to possess
antimicrobial and antioxidant poperties, which may play an
important role in both the antioxidant and antimicrobial activities
of the ethanol extract of this species. Flavone glycosides; luteolin-
7-O glycoside and apigenin-7-O glycoside, were also present in the
ethanol extract of C. nigra, which demonstrated good antioxidant
and antimicrobial activity against Gram positive bacterial strains
and may contribute to the overall antioxidant and antimicrobial
activity of this extract. With the ever increasing demand for natural
preservatives in our foods, wild plants remain a largely
untapped resource. The preliminary bioactivity screening carried
out by this study has shown the efficacy of extracts from wild edible
plant extracts, further strengthening their consideration as
cheap sources of natural antimicrobial and/or antioxidant preservatives
in future food product manufacturing.
stains at reasonably low concentrations (MIC = 187.5–375 lg/ml).The high phenolic content in some ethanol extracts also exhibitinghigh antimicrobial and/or antioxidant activities suggested that thepresence of phenolic compounds might play an important role inthese properties. Further investigations on the presence of phenolicsusing UPLC–MS/MS analysis present revealed that some ethanolextracts with high antioxidant activity also contained largeamounts of chlorogenic acid, while in the corresponding waterextracts this compound was significantly less abundant. Significantlevels of caffeic acid were also present in ethanol extracts of C.arvense, C. palustre and C. nigra. The ethanol extract of A. minuswas the only extract in the present study which contained rosmarinicacid, a compound which has previously been reported to possessantimicrobial and antioxidant poperties, which may play animportant role in both the antioxidant and antimicrobial activitiesof the ethanol extract of this species. Flavone glycosides; luteolin-7-O glycoside and apigenin-7-O glycoside, were also present in theethanol extract of C. nigra, which demonstrated good antioxidantand antimicrobial activity against Gram positive bacterial strainsand may contribute to the overall antioxidant and antimicrobialactivity of this extract. With the ever increasing demand for naturalpreservatives in our foods, wild plants remain a largelyuntapped resource. The preliminary bioactivity screening carried
out by this study has shown the efficacy of extracts from wild edible
plant extracts, further strengthening their consideration as
cheap sources of natural antimicrobial and/or antioxidant preservatives
in future food product manufacturing.
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