Flavonoid Composition and Antioxidant Activity of Tree Peony (Paeonia SectionMoutan) Yellow Flowers

Abstract

Tree peony flowers are edible and traditional Chinese medicine materials. In the present study, 26 flavonoids were identified and quantified in yellow flowers of tree peony by high-performance liquid chromatography with diode array detector (HPLC-DAD) and by HPLC-electrospray ionization-mass spectrometry (HPLC-ESI-MS). Seventeen of them were first reported in flowers of tree peony, and glycosides of kaempferol, luteolin, and apigenin as well as isosalipurposide were the main flavonoids investigated. Furthermore, the petal extracts showed high antioxidant activity according to DPPH*, ABTS*(+), and OH* scavenging assays and ferric reducing antioxidant power assay. There were significant correlations between antioxidant activity and both the total polyphenol content (determined by Folin-Ciocalteu method) and the total content of quercetin, kaempferol, and luteolin glycosides. This work is valuable for elucidation of phenolic composition in tree peony flowers and for further utilization of them as functional food and medicine materials.

Solvent effects on phenolic content, composition, and antioxidant activity of extracts from florets of sunflower (Helianthus annuus L.)

“…It was implied that aqueous alcohol of medium polarity was the optimal solvent for extracting antioxidant phenolics from sunflower florets. The phenolic extracts from sunflower florets exhibited much lower antioxidant values than the extracts from tree peony yellow flowers (Li et al, 2009), which were rich in flavonoids. The radical scavenging activities against DPPH radicals for 90% (v/v) aqueous methanol extracts of ray florets and disc florets, were 11801.9 ± 641.7 and 13697.5 ± 37.6 M TEAC/100 g dw, respectively.…”

Transcriptome analysis of tree peony during chilling requirement fulfillment: Assembling, annotation and markers discovering

“…In particular, transcripts involved in biosynthesis pathways of alkaloids, flavones/flavonoids, flavonoids and terpenoid backbone were abundant in our 454-EST datasets. Tree peony is a well-known economic plant which is rich in flavonoid (Li et al, 2009;Wang et al, 2001), and the transcripts discovered in our 454 data would provide valuable information to study the biosynthetic mechanism of medicinal ingredients in tree peony.…”

Anthocyanins composition and antioxidant activity of two major wild Nitraria tangutorun Bobr. variations from Qinghai–Tibet Plateau

“…The DPPH assay was performed according to the method used by Li et al (2009) with slight modification, and the method was used widely to evaluate the free radical scavenging activity of plant extraction due to its stable character (Brand-Williams et al, 1995). GA was used as the reference compound.…”