Further Knowledge on the Phenolic Profile of Colocasia esculenta (L.) Shott

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Federico Ferreres (Author) Other; Rui F Goncalves (Author) Other; Angel Gil Izquierdo (Author) Other; Patricia Valentao (Author) FFUP; Artur M S Silva (Author) Other; Joao B Silva (Author) Other; Delfim Santos (Author) Other; Paula B Andrade (Author) FFUP

Journal

Title: Journal of Agricultural and Food Chemistry

Vol. 60

Pages: 7005-7015

ISSN: 0021-8561

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 15 Citations

Scientific classification

FOS: Agrarian Sciences > Other Agrarian Sciences

Other information

Authenticus ID: P-002-7YF

DOI: 10.1021/jf301739q

Abstract (EN): Colocasia esculenta (L.) Shott, commonly called taro, is an ancient species selected for its edible tuber. Its huge "elephant ear" like leaves are also consumed in sauces and stews or as soups. Forty-one phenolic metabolites (11 hydroxycinnamic acid derivatives and 30 glycosylated flavonoids) were identified by high-performance liquid chromatography diode array detection-electrospray ionization/mass spectrometry (HPLC-DAD-ESI/MSn) in the leaves of two C. esculenta varieties cultivated in Azores Islands. To our knowledge, 34 of the 41 phenolic compounds are being reported for the first time in this species. Phenolics quantification was achieved by an HPLC-DAD accurate and sensitive validated method. Although the qualitative profile of the two varieties is quite similar, quantitative differences were observed between them. "Giant white" and "red" varieties (local denomination) contain, respectively, ca. 14 and 21% of phenolic acids, 37 and 28% of flavones mono-C-glycosides, 42 and 43% of flavones di-C-glycosides, 3 and 4% of flavones mono-C-(O-glycosyl)glycosides, and both of them ca. 2% of flavones di-C-(O-glycosyl)glycosides and 2% of flavones-O-glycosides. Luteolin-6-C-hexoside was the compound present in higher amounts in both varieties. The established phenolic profile is an added value for the authenticity and quality control of C. esculenta and may be useful in the discrimination of its varieties.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11