Widespread occurrence in plant world, e.g. Campanula and Diospyros spp., Trifolium pannonicum flowers, Pinus sylvestris (Scotch pine), fruits of Scolymus hispanicus (Spanish salsify) and leaves of Lespedeza cuneata
4H-1-Benzopyran-4-one, 3-(β-D-galactopyranosyloxy)-5,7-dihydroxy-2-(4-hydroxyphenyl)-/Kaempferol 3-O-β-D-galactoside/Kaempferol-3-O-β-D-galactoside/Kaempferol-3-O-D-galactopyranoside/Trifolin/5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-oxo-4H-chromen-3-yl β-D-galactopyranoside
823.2±65.0 °C at 760 mmHg
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provides coniferyl ferulate(CAS#:23627-87-4) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate
Apple is rich in flavonol glycosides, which are believed to contribute to putative health benefits associated with apple consumption. Glycosylation, catalyzed by uridine diphospho-glycosyltransferases (UGTs), is the last step in flavonol biosynthesis, which confers molecular stability and solubility to the flavonol. In the present study, the involvement of two UGTs, MdUGT75B1 and MdUGT71B1, in flavonol biosynthesis in apple was investigated. The major flavonols are quercetin 3-O-glycosides, and UV-B and blue light treatment significantly enhanced the accumulation of quercetin 3-O-galactoside, quercetin 3-O-glucoside, and kaempferol 3-O-galactoside. Transcript levels of MdUGT75B1 and MdUGT71B1 in fruit subjected to different treatments were correlated well with flavonol accumulation. MdUGT75B1 showed flavonol-specific activity with a preference for UDP-galactose as the sugar donor, while MdUGT71B1 using UDP-glucose exhibited a wider substrate acceptance. Thus, MdUGT75B1 and MdUGT71B1 are key UGTs involved in flavonol biosynthesis and may have important roles in regulating accumulation of these health-promoting bioactive compounds in apple.
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(-)-catechin (PubChem CID: 73160); (-)-epicatechin (PubChem CID: 72276); Apple; Flavonol glycoside; Glycosyltransferase; Light treatment; UDP-galactose (PubChem CID: 18068); UDP-glucose (Pub Chem CID: 8629); apigenin (PubChem CID: 5280443); cyanidin chloride (PubChem CID: 68247); daidzein (PubChem CID: 5281708); genistein (PubChem CID: 5280961); hesperetin (PubChem CID: 72281); kaempferol (PubChem CID: 5280863); kaempferol 3-O-galactoside (PubChem CID: 5282149); kaempferol 3-O-glucoside (PubChem CID: 5282102); luteolin (PubChem CID: 5280445); malvidin chloride (PubChem CID: 69512); myricetin (PubChem CID: 5281672); naringenin (PubChem CID: 932); quercetin (PubChem CID: 5280343); quercetin 3-O-galactoside (PubChem CID: 5281643); quercetin 3-O-glucoside (PubChem CID: 5280804); quercetin 3-O-rhamnoside (PubChem CID: 5280459); quercetin 3-O-rutinoside (PubChem CID: 5280805)
Involvement of MdUGT75B1 and MdUGT71B1 in flavonol galactoside/glucoside biosynthesis in apple fruit.
Xie L, Cao Y, Zhao Z, Ren C, Xing M, Wu B, Zhang B, Xu C, Chen K, Li X.
2020 May 15;
As a continuation of investigating Impatiens L. genus, eight flavonoids, eriodyctiol, eriodyctiol 7-O-β-ᴅ-glucoside, kaempferol 3-O-β-ᴅ-glucoside, kaempferol 3-O-β-ᴅ-galactoside, kaempferol 3-rhamnosyl-di-glucoside, kaempferol 3-O-β-ᴅ-rutinoside, quercetin 3-O-β-ᴅ-glucoside and quercetin 3-O-β-ᴅ-galactoside, two phenolic acids – p-hydroxybenzoic acid and protocatechuic acid, and 2-methoxynaphthalene-1,4-dione were isolated from the aerial parts of I. glandulifera collected in Poland. The structures of the compounds were established by analysis of their spectroscopic (1H and 13C NMR) and spectrometric (MS) data, as well as by comparison of these with those reported in the literature. Quercetin 3-O-β-ᴅ-glucoside, kaempferol 3-O-β-ᴅ-galactoside and kaempferol 3-O-β-ᴅ-rutinoside were isolated for the first time from the investigated taxon. In addition, the antioxidant activities in different tests of all obtained compounds were evaluated. The results clearly showed that among analyzed constituents, quercetin 3-O-β-ᴅ-glucoside exhibited antioxidant activity comparable or better than ascorbic acid and Trolox which were used as a positive control.
Balsaminaceae; Impatiens glandulifera; antioxidant activity; flavonoids; phenolics
Phenolic constituents of the aerial parts of Impatiens glandulifera Royle (Balsaminaceae) and their antioxidant activities.
Szewczyk K, Sezai Cicek S, Zidorn C, Granica S.
The peel of astringent persimmon (Diospyros kaki Thunb. cv. Cheongdo-Bansi) is a by-product of dried persimmon (gotgam). We investigated if deastringent peel extracts of persimmon cv. Cheongdo-Bansi had antioxidative and neuroprotective properties. Two different extracts were prepared: thermally and nonthermally treated persimmon peel extracts (TPE and NTPE, respectively). Both TPE and NTPE were fractionated sequentially in n-hexane, chloroform, ethyl acetate, n-butanol, and water. The TPE and NTPE ethyl acetate fractions had the highest total phenolic and flavonoid contents as well as antioxidant capacities among all the fractions. Pretreatment of neuronal PC-12 and SH-SY5Y cells with the TPE and NTPE ethyl acetate fractions increased cell viability after exposure to oxidative stress. The ethyl acetate fraction of TPE attenuated oxidative stress inside both PC-12 and SH-SY5Y cells more effectively than that of NTPE. Furthermore, the TPE and NTPE ethyl acetate fractions inhibited acetylcholinesterase and butyrylcholinesterase. Analysis of ultra-high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry results revealed gallic acid, kaempferol, kaempferol-3-O-galactoside, kaempferol-3-O-glucoside, quercetin, quercetin-3-O-galactoside, quercetin-3-O-galactoside-2′-O-gallate, and quercetin-3-O-glucoside as the major phenolics of the TPE and NTPE ethyl acetate fractions. Taken together, these results suggest that the ethyl acetate fraction of deastringent persimmon peel is rich in antioxidants and has potential as a functional food to reduce oxidative stress.
Antioxidant; by-product; deastringent persimmon peel; polyphenol; ultra-high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry
Deastringent Peel Extracts of Persimmon (Diospyros kaki Thunb. cv. Cheongdo-Bansi) Protect Neuronal PC-12 and SH-SY5Y Cells against Oxidative Stress.
Jeong DW, Cho CH, Lee JS, Lee SH, Kim T, Kim DO.
2018 Jul 28