Polar Biology

, Volume 31, Issue 5, pp 605–608

Antioxidant activity of polar lichens from King George Island (Antarctica)

  • Babita Paudel
  • Hari Datta Bhattarai
  • Jin Sung Lee
  • Soon Gyu Hong
  • Hyun Woung Shin
  • Joung Han Yim
Original Paper

Abstract

Antioxidant agents prevent reactive oxygen species, which can cause degenerative diseases. Natural antioxidants are preferred over many synthetic antioxidants, which can be toxic, for therapeutic applications. Five lichen species were collected from King George Island, Antarctica. Antioxidant activities as assessed by DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical and ABTS•+ [2,2’-azinobis-(3-ethylbenzothiazoline-6-sulfonate)] radical scavenging capacities were determined and compared with those of commercial standards BHA (butylated hydroxyanisole) and trolox [(±)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid]. The results indicated that two lichens exhibited comparatively high antioxidant activities with the remaining three exhibiting less activity. The antioxidant activity was concentration-dependent. When compared, the antioxidant activity of crude extracts from polar lichens to previously published data for tropical and temperate lichen species, we concluded that lichens of Antarctic origin may be the potent sources of strong antioxidant agents. Such species should be explored as novel sources of effective antioxidant metabolites.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Babita Paudel
    • 1
    • 2
  • Hari Datta Bhattarai
    • 1
  • Jin Sung Lee
    • 1
  • Soon Gyu Hong
    • 1
  • Hyun Woung Shin
    • 2
  • Joung Han Yim
    • 1
  1. 1.Polar BioCenter, Korea Polar Research Institute, KOPRI, Songdo TechnoparkYeonsu-gu, IncheonSouth Korea
  2. 2.Department of Marine BiotechnologySoonchunhyang University, Shinchang myunAsan City, Chunchannam-doSouth Korea

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