Polyphenolic Composition and Antioxidant Characteristics of Kumquat (Fortunella margarita) Peel Fractions

Abstract

The polyphenolic composition of two Fortunella margarita (Nagami kumquat) specimens from Greece and Egypt was investigated employing fractionation by solvent partition and liquid chromatography-mass spectrometry. The main groups of phenolics identified in the different fractions generated were C-glycosylated flavones, O-glycosylated flavones, C-glycosylated flavanones, O-glycosylated flavanones, flavonols, chalcones, phenolic acids and derivatives thereof. The antioxidant potency of the fractions was assessed using two representative in vitro tests, including antiradical activity and hydroxyl free radical scavenging activity. It was revealed that the ethyl acetate fractions from both specimens contained the higher polyphenol content and exhibited the better antioxidant characteristics. The results indicated that F. margarita peels may be regarded as a rich source of potentially bioactive polyphenols.

Tyrosinase inhibitory components of immature calamondin peel

“…The compound, 3 0 ,5 0 -di-C-b-glucopyranosylphloretin, a dihydrochalcone derivative, has been reported in the kumquat (Fortunella margarita and japonica) (Jayaprakasha, Murthy, Etlinger, Mantur, & Patil, 2012;Sadek et al, 2009;Cho et al, 2005) and in Kumquat juice (Barreca, Bellocco, Caristi, Leuzzi, & Gattuso, 2010). A large quantity of 3 0 ,5 0 -di-C-b-glucopyranosylphloretin has also been found in genus Fortunella as well as calamondin (Ogawa et al, 2001), although calamondin is believed to be a hybrid between Citrus reticulata Blanco and Fortunella spp.…”

“…(Moshonas & Shaw, 1996). However, the flavonoids composition of Fortunella species differs from those of the Citrus species (Sadek, Makris, & Kefalas, 2009).…”

Isolation, Structure Elucidation of Ferulic and Coumaric acids from Fortunella japonica Swingle leaves and their Structure Antioxidant activity relationship

“…1 The leaves and fruits of the Fortunella species have been used in folk medicine in China and recently more attempts have been made to study the pharmacological activities of some bioactive compounds isolated from kumquat, the peel of the fruit has been extensively studied. 2 Phenolic composition and antioxidant characteristics of kumquat were only confined to the peel content of the fruits. 2 The most widely distributed polyphenolic compounds in plant tissues are hydroxycinnamic acids.…”

“…2 Phenolic composition and antioxidant characteristics of kumquat were only confined to the peel content of the fruits. 2 The most widely distributed polyphenolic compounds in plant tissues are hydroxycinnamic acids. Some of the most common naturally occurring HCAs are p-coumaric acid, ferulic acid, sinapic acid, and caffeic acid.…”

Nutraceutical Potential of Agri-Horticultural Wastes

“…Besides their delicious taste and flavor, they are known to reduce risk of several chronic diseases. Fruits and vegetables contain significant amounts of phytoconstituents which are negatively associated with the morbidity and mortality from cerebrovascular, cardiovascular and certain types of cancers [4,30,44]. Foods are generally consumed for their nutritive value and bioactive compounds [9].…”