Monomeric and oligomeric flavan-3-ols and antioxidant activity of leaves from different Laurus sp.

Ferreira da Vinha, Ana; Guido, Luís F.; Costa, Anabela S.G.; Alves, Rita C.; Oliveira, M. Beatriz P. P.

http://hdl.handle.net/10284/9772

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Authors

Ferreira da Vinha, Ana

Guido, Luís F.

Costa, Anabela S.G.

Alves, Rita C.

Oliveira, M. Beatriz P. P.

Abstract(s)

The phenolic profile and antioxidant activity of three endemic Laurus sp. from Portugal were analysed. Dried leaves of L. nobilis L., L. azorica (Seub.) Franco, and L. novocanariensis Rivas Mart., Lousã, Fern. Prieto, E. Días, J. C. Costa & C. Aguiar, collected in the mainland and in the Azores and Madeira archipelagos, respectively, were used to prepare different extracts (aqueous, ethanolic and hydroalcoholic). They were studied regarding their DPPH˙ scavenging activity, total phenolic and flavonoid contents, and the main phenolic compounds were identified by HPLC-DAD-ESI-MS/MS. Total flavonoid contents were 30.1, 46.3, and 36.7 mg of epicatechin equivalents per g of sample (dry weight) for L. nobilis, L. azorica and L. novocanariensis, respectively. Epicatechin was the major compound, representing ∼12.1% of total flavan-3-ols in L. nobilis, ∼25.6% in L. azorica, and ∼19.9% in L. novocanariensis. Although all samples presented a similar phenolic profile, significant differences were observed in their total contents and antioxidant activity.

Keywords

Laurus sp. Phenolic profile Bioactive compounds Antioxidant activity

URI

http://hdl.handle.net/10284/9772

Citation

Vinha, A.F., Guido, L., Costa, A.S.G., Alves, R.C., Oliveira, M.B.P.P. 2015. Monomeric and oligomeric flavan-3-ols and antioxidant activity of leaves from different Laurus sp. Food & Function, 6(6), 1944-1949. (doi: 10.1039/C5FO00229J).