Antioxidant and antimicrobial properties of Moltkia petraea (Tratt.) Griseb. flower, leaf and stem infusions

0359311 - ÚEB 2011 RIV GB eng J - Journal Article
Končić, M. Z. - Kremer, D. - Grúz, Jiří - Strnad, Miroslav - Biševac, G. - Kosalec, I. - Šamec, D. - Piljac-Žegarac, J. - Karlović, K.
Antioxidant and antimicrobial properties of Moltkia petraea (Tratt.) Griseb. flower, leaf and stem infusions.
Food and Chemical Toxicology. Roč. 48, č. 6 (2010), s. 1537-1542. ISSN 0278-6915. E-ISSN 1873-6351
R&D Projects: GA AV ČR KAN200380801
Institutional research plan: CEZ:AV0Z50380511
Keywords : Moltkia petraea * Antioxidant activity * Antimicrobial activity
Subject RIV: EF - Botanics
Impact factor: 2.602, year: 2010

Antioxidant and antimicrobial activities as well as the quantity of phenolic substances were determined in aqueous extracts of leaves, stems and flowers of Moltkia petraea (Tratt.) Griseb. from two mountainous localities (Sveti Jure and Snijezˇnica) in Croatia. In addition, the profile of phenolic acids was analyzed by UPLC–MS/MS. Antioxidant activities of all extracts in different test systems, namely the DPPH radical scavenging, reducing power assay and chelating activity, increased with extract concentration. The leaf extracts from Snijeznica demonstrated superior antioxidant activity in most of the assays, while the stem extract from the same locality was the most effective Fe2+ ion chelator. In general, the extracts from Snijeznica were more effective antioxidants than the corresponding extracts from Sveti Jure. The aqueous extracts of M. petraea did not show antimicrobial activity against bacteria and fungi tested in the diffusion and dilution assays.
Permanent Link: http://hdl.handle.net/11104/0197115