Professional paper

Bioactive compounds glucosinolates and polyphenols in florets, leaves and stems of broccoli (Brassica oleracea var. italica L.)

Ivana Radojčić Redovniković ; Prehrambeno-biotehnološki fakultet, Sveučilište u Zagrebu
Marina Cvjetko Bubalo ; Prehrambeno-biotehnološki fakultet, Sveučilište u Zagrebu
Manuela Panić ; Prehrambeno-biotehnološki fakultet, Sveučilište u Zagrebu
Kristina Radošević ; Prehrambeno-biotehnološki fakultet, Sveučilište u Zagrebu

Abstract

Broccoli is rich in bioactive compounds, polyphenols and glucosinolates, and as such considered as functional food and great experimental material. Previous scientific attention had mostly been focussed on composition and amounts of phytochemicals in florets rather than leaves and stem. In this research, content of total and individual glucosinolates, total polyphenols and antioxidative capacity were studied in broccoli florets, leaves and stems. Leaves showed to be the most abundant in glucosinolates with indolyl predominating aliphatic as was also the case in florets. In contrast, stem contained more aliphatic than indolyl glucosinolates. Polyphenol quantity ranged from 9.70-16.11 mg GE g-1 DW in stems, from 17.65-31.08 mg GE g-1 DW in florets and from 22.27-34.02 mg GE g-1 DW in leaves and was the highest in leaves irrespective of extraction method. It was determined that samples containing the highest amounts of polyphenols also had the highest antioxidant activity.

Keywords

broccoli; glucosinolates; ORAC; polyphenolic compunds

Hrčak ID:

168266

URI

https://hrcak.srce.hr/168266

Publication date:

2.11.2016.

Article data in other languages: croatian

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