Chemical composition of the essential oil and antioxidant activity of methanolic extracts from fruits and flowers of Hypericum lydium Boiss.


Serbetci T., Ozsoy N. , Demirci B., Can A. , Kultur S. , Baser K. H. C.

INDUSTRIAL CROPS AND PRODUCTS, vol.36, pp.599-606, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 36
  • Publication Date: 2012
  • Doi Number: 10.1016/j.indcrop.2011.11.002
  • Title of Journal : INDUSTRIAL CROPS AND PRODUCTS
  • Page Numbers: pp.599-606
  • Keywords: Hypericum lydium, Essential oil, Antioxidant, DPPH, TBARS, GC and GC-MS, ST JOHNS WORT, AERIAL PARTS, PHENOLIC-COMPOUNDS, ROBSON, L., CONSTITUENTS, TRIQUETRIFOLIUM, HYSSOPIFOLIUM

Abstract

This study was conducted to evaluate the essential oil composition and antioxidant activity of methanolic extracts from fruits and flowers of Hypericum lydium Boiss., a wild growing species of the Turkish flora. The antioxidant activities were determined through several biochemical assays. Both extracts showed an inhibitory effect against the formation of TBARS in a phosphatidylcholine liposome model system, moderate scavenging effect on DPPH center dot and superoxide radicals, prominent reducing power and inhibitory effect on deoxyribose degradation in both the nonsite and site-specific assay, but a greater hydroxyl radical scavenging activity was observed in the non-site specific assay, suggesting that the extracts were better at scavenging hydroxyl radicals than at chelating iron. Correlation analysis indicated that there was a linear relationship between antioxidant potency, free-radical scavenging activity, reducing power and the content of flavonoids of fruits and flowers extracts. The essential oils obtained by hydrodistillation were analyzed by GC and GC-MS. In total forty-three compounds were identified. The most abundant components were monoterpenes hydrocarbons represented principally by alpha-pinene. The tested oil showed no antioxidant activity. (C) 2011 Elsevier B.V. All rights reserved.