Abstract
In this work, we report the phytochemical composition and bioactive potential of methanolic and aqueous extracts of leaves fromLimonium delicatulum(Girard) Kuntze andLimonium quesadenseErben. The characterization and quantitation of individual phytochemicals were performed with liquid chromatography with diode array and electrospray-tandem mass spectrometry detection. Myricetin glycosides were abundant inL. delicatulum, whereasL. quesadensewas rich in gallo(epi)catechin-O-gallate. Total phenolics, flavonols, and flavonoids were assayed with conventional methods. Antioxidant and radical scavenging assays (phosphomolybdenum, DPPH, ABTS, CUPRAC, FRAP, and metal chelating activity), as well as enzyme inhibitory assays (acetylcholinesterase, butyrylcholinesterase, tyrosinase, amylase, glucosidase, and lipase), were performed to evaluate the potential bioactivity. The methanolic extracts of both species presented higher phenolic content and bioactivity than the aqueous extracts. Overall,L. quesadenseextracts exhibited the most potent activity for most assays, representing a potential source of bioactive compounds for the pharmaceutical and food industries.
Highlights
Plants represent a rich source of many bioactive compounds, polyphenols, which are well known for their high antioxidant activity and various health benefits
Taking into account the lack of information concerning the two target species—as well as the reports of the bioactivity of other Limonium species—this research aims at providing information concerning the phenolic composition of leaves of L. delicatulum and L. quesadense, examining their antioxidant activity and enzyme inhibitory properties
Leaves of L. quesadense and L. delicatulum were collected at the Native Flora Garden of the University of Jaen (Jaen, Andalusia, Spain; 37°47′18.879′′N 3°46′31.583′′W, 427 m a.s.l.) in September 2018
Summary
Plants represent a rich source of many bioactive compounds, polyphenols, which are well known for their high antioxidant activity and various health benefits. Taking into account the lack of information concerning the two target species—as well as the reports of the bioactivity of other Limonium species—this research aims at providing information concerning the phenolic composition of leaves of L. delicatulum and L. quesadense, examining their antioxidant activity (radical scavenging, reducing power, and metal chelating) and enzyme inhibitory properties (against acetylcholinesterase, butyrylcholinesterase, tyrosinase, amylase, glucosidase, and lipase). We quantified 16 compounds in the methanolic and aqueous extracts of L. quesadense and L. delicatulum.
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