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Antioxidant Activities of Bacterial Culture Extracts Isolated from Arctic Lichens

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Title
Antioxidant Activities of Bacterial Culture Extracts Isolated from Arctic Lichens
Other Titles
북극 지의류로부터 분리한 미생물 배양 추출액의 항산화 활성
Authors
Kim, Mi-Kyeong
Oh, Tae-Jin
Park, Hyun
Subject
Life Sciences & Biomedicine - Other Topics
Keywords
ABTS; Arctic lichen; antioxidant activity
Issue Date
2012
Publisher
한국미생물생명공학회
Citation
Kim, Mi-Kyeong, Oh, Tae-Jin, Park, Hyun. 2012. "Antioxidant Activities of Bacterial Culture Extracts Isolated from Arctic Lichens". Korean J. Microbiol. Biotechnol, 40(4): 333-338.
Abstract
Lichens are a symbiosis between fungi, algae and cyanobacteria. Our group recently studied the antioxidant properties of some bacterial species isolated from Arctic lichens and we confirmed that they possess high antioxidant activities. In this paper, we investigated the antioxidant capacity of 5 microorganisms newly isolated from 4 Arctic lichen species, Cladonia sp., Sterocaulon sp., Umbilicaria sp. and Cetraria sp., using various solvent extractions. We carried out 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2,2-azino-bis(3-ethyl benzothiazoline- 6-sulphonic acid) (ABTS) free radical scavenging activity test and ferric reducing antioxidant power (FRAP) assay. Also total phenolic and flavonoid content assays were performed. Among the bacterial culture extracts of the tested lichen-microorganisms, ethyl acetate extracts of Burkholderia sordidicola S5- B(T) had not only a high antioxidant activity (72.9%) when compared with the ascorbic acid used as the control (51.3%) in the DPPH assay, but also a high amount of phenolic content as well as flavonoid content. As a result, these lichen-microorganisms may be potentially useful sources of natural antioxidants.
URI
http://repository.kopri.re.kr/handle/201206/6529
DOI
http://dx.doi.org/10.4014/kjmb.1207.07027
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