DSpace
 
  Repositório Institucional da Universidade de Aveiro > QOPNA - Química Orgânica de Produtos Naturais e Agroalimentares > QOPNA - Artigos >
 Characterization of Plum Procyanidins by Thiolytic Depolymerization
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6947

title: Characterization of Plum Procyanidins by Thiolytic Depolymerization
authors: Nunes, Cláudia
Guyot, Sylvain
Marnet, Nathalie
Barros, António S.
Saraiva, Jorge A.
Renard, Catherine M. G. C.
Coimbra, Manuel A.
keywords: ‘Green Gage’
‘Mirabelle’
‘Golden Japan’
reversed-phase HPLC
phenolic compounds
hydroxycinnamic acid
flavan-3-ols
flavonols
issue date: 2008
publisher: American Chemical Society
abstract: The phenolic compounds of ?Green Gage? (GG) plums (Prunus domestica L.), ?Rainha Cla?udia Verde?, from a ?protected designation of origin? (PDO), in Portugal, were quantified in both flesh and skin tissues of plums collected in two different orchards (GG-V and GG-C). Analyzes of phenolic compounds were also performed on another GG European plum obtained in France (GG-F) and two other French plums, ?Mirabelle? (M) and ?Golden Japan? (GJ). Thiolysis was used for the first time in the analysis of plum phenolic compounds. This methodology showed that the flesh and skin contain a large proportion of flavan-3-ols, which account, respectively, for 92 and 85% in GJ, 61 and 44% in GG-V, 62 and 48% in GG-C, 54 and 27% in M, and 45 and 37% in GG-F. Terminal units of procyanidins observed in plums are mainly (+)-catechin (54?77% of all terminal units in flesh and 57?81% in skin). The GJ plums showed a phenolic composition different from all of the others, with a lower content of chlorogenic acid isomers and the presence of A-type procyanidins as dimers and terminal residues of polymerized forms. The average degree of polymerization (DPn) of plum procyanidins was higher in the flesh (5?9 units) than in the skin (4?6 units). Procyanidin B7 was observed in the flesh of all GG plums and in the skin of the Portuguese ones. Principal component analysis of the phenolic composition of the flesh and skin of these plums obtained after thiolysis allowed their distinction according to the variety and origin, opening the possibility of the use of phenolic composition for variety/origin identification.
URI: http://hdl.handle.net/10773/6947
ISSN: 0021-8561
publisher version/DOI: http://dx.doi.org/10.1021/jf8006135
source: Journal of Agricultural and Food Chemistry
appears in collectionsQOPNA - Artigos

files in this item

file description sizeformat
P25_JAFC_Plums phenolics.pdf550.9 kBAdobe PDFview/open
statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! RCAAP OpenAIRE DeGóis
ria-repositorio@ua.pt - Copyright ©   Universidade de Aveiro - RIA Statistics - Powered by MIT's DSpace software, Version 1.6.2