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Title: Inflorescences of Brassicacea species as source of bioactive compounds: a comparative study
Authors: Sousa, C.
Taveira, M.
Valentão, P.
Fernandes, F.
Pereira, J.A.
Estevinho, Leticia M.
Bento, Albino
Ferreres, F.
Seabra, R.M.
Andrade, P.B.
Keywords: Brassica oleracea L. var. costata DC
Brassica oleracea L. var. acephala
Brassica rapa var. rapa L.
Phenolic compounds
Organic acids
Antioxidant activity
Antimicrobial activity
Issue Date: 2008
Publisher: Elsevier
Citation: Sousa, C.; Taveira, M.; Valentão, P.; Fernandes, F.; Pereira, J.A.; Estevinho, Letícia M.; Bento, Albino; Ferreres, F.; Seabra, R.M.; Andrade, P.B. (2008) - Inflorescences of Brassicacea species as source of bioactive compounds: a comparative study. Food Chemistry. ISSN 0308-8146. 110:4, p. 953-961
Abstract: Two Brassica oleracea varieties (B. oleracea L. var. costata DC and B. oleracea L. var. acephala) and Brassica rapa L. var. rapa inflorescences were studied for their chemical composition and antioxidant capacity. Phenolic compounds and organic acids profiles were determined by HPLC–DAD and HPLC–UV, respectively. B. oleracea var. costata and B. oleracea L. var. acephala inflorescences presented a similar qualitative phenolic composition, exhibiting several complex kaempferol derivatives and 3-p-coumaroylquinic acid, while B. rapa var. rapa was characterized by kaempferol and isorhamnetin glycosides and several phenolic acids derivatives. B. oleracea L. var. costata and B. rapa var. rapa showed the highest phenolics content. The three Brassica exhibited the same six organic acids (aconitic, citric, pyruvic, malic, shikimic and fumaric acids), but B. oleracea L. var. acephala presented a considerably higher amount. Each inflorescence was investigated for its capacity to act as a scavenger of DPPH radical and reactive oxygen species (superoxide radical, hydroxyl radical and hypochlorous acid), exhibiting antioxidant capacity in a concentration dependent manner against all radicals. These samples were also studied for its antimicrobial potential against Gram-positive and Gram-negative bacteria and fungi, displaying antimicrobial capacity only against Gram-positive bacteria.
Peer review: yes
ISSN: 0308-8146
Appears in Collections:PTV - Artigos em Revistas Indexados ao ISI/Scopus

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