title: Determination of some polyphenolic compounds from Allium species by HPLC-UV-MS.
abstract: Five Allium species (Allium obliquum L., A. senescens L. subsp. montanum (Fries) Holub, A. schoenoprasum L. subsp. schoenoprasum, A. fistulosum L. and A. ursinum L.) were analysed in order to determine the presence of 19 polyphenolic compounds through an HPLC method coupled with UV and mass spectrometry detection. The pattern of phenol carboxylic acids indicates the presence of p-coumaric and ferulic acids in all species. Isoquercitrin was found in A. obliquum, A. schoenoprasum and A. fistulosum, rutin in A. senescens subsp. montanum and A. schoenoprasum, whereas quercitrin was found only in A. fistulosum, so they represent potential taxonomic markers that differentiate the four plants. Luteolin and apigenin were identified before and after hydrolysis only in A. obliquum. The amounts of all polyphenols were higher in hydrolysed samples, suggesting that these substances are present both as unbonded and bonded glycosides and/or esters. Our study showed large differences between the five Allium species, both qualitative and quantitative.
authors.affiliation: Department of Biology, Faculty of Biology and Geology, Babes-Bolyai University, 400015 Cluj-Napoca, Romania.
authors.forename: Marcel
authors.initials: M
authors.lastname: Parvu
authors.forename: Anca
authors.initials: A
authors.lastname: Toiu
authors.forename: Laurian
authors.initials: L
authors.lastname: Vlase
authors.forename: Elena
authors.initials: E
authors.lastname: Alina Parvu
mesh_terms: D000490:Allium / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis* / Q000737:chemistry; D013058:Mass Spectrometry; D010636:Phenols / Q000032:analysis* / Q000737:chemistry; D035261:Plant Components, Aerial / Q000737:chemistry; D059808:Polyphenols; D012383:Romania; D013056:Spectrophotometry, Ultraviolet
chemical_list: D005419:Flavonoids; D010636:Phenols; D059808:Polyphenols