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Advisor(s)
Abstract(s)
A phytochemical study was undertaken on tronchuda cabbage ( Brassica oleracea L. var. costata DC) cultivated under conventional and organic practices and collected at different times. Six organic
acids (aconitic, citric, ascorbic, malic, shikimic, and fumaric acids) were identified and quantified by
HPLC-UV. Qualitative and quantitative differences were noted between internal and external leaves.
Analysis of the phenolics of the internal leaves was achieved by HPLC-DAD, and the phenolic profile
obtained was revealed to be distinct from that of the external leaves. By this means were identified
and quantified 11 compounds: 3- p-coumaroylquinic acid, kaempferol 3-O-sophoroside-7-O-glucoside,
kaempferol 3- O-(caffeoyl)sophoroside-7- O-glucoside, kaempferol 3- O-(sinapoyl)sophoroside-7- Oglucoside,
kaempferol 3- O-(feruloyl)sophoroside-7- O-glucoside, kaempferol 3- O-sophoroside, two
isomeric forms of 1,2-disinapoylgentiobiose, 1-sinapoyl-2-feruloylgentiobiose, 1,2,2¢-trisinapoylgentiobiose,
and 1,2¢-disinapoyl-2-feruloylgentiobiose. In general, internal leaves exhibited more constant
chemical profiles.
Description
Keywords
Tronchuda cabbage Brassica oleracea L. var. costata DC Organic acids Phenolic compounds Organic and conventional production
Citation
Sousa, C.; Valentão, P.; Rangel, Joana; Lopes, Graciliana; Pereira, J.A.; Ferreres, F.; Seabra, R.M.; Andrade, P.B. (2005). Influence of two fertilization regimes on the amounts of organic acids and phenolic compounds of tronchuda cabbage (Brassica oleracea L. var. costata DC). Journal of Agricultural and Food Chemistry. ISSN 0021-8561. 53:23, p. 9128-9132.
Publisher
ACS