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Cellular growth and fatty acid content of Arctic green microalgae

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Title
Cellular growth and fatty acid content of Arctic green microalgae
Other Titles
북극 미세조류의 성장률과 지질함량 분석
Authors
Jung, Woongsic
Park, Keunbo
Choi, Han-Gu
Kang, Sung-Ho
Kim, Sanghee
Han, Se Jong
Lim, Suyoun
Kim, Eun Jae
Keywords
arctic; chlamydomonadalean algae; fatty acid methyl ester; microalgae; psychrophilic
Issue Date
2016
Citation
Jung, Woongsic, et al. 2016. "Cellular growth and fatty acid content of Arctic green microalgae". ALGAE, 31(1): 61-72.
Abstract
Arctic microalgae thrive and support primary production in extremely cold environment. Three Arctic green microalgal strains collected from freshwater near Dasan Station in Ny-Alesund, Svalbard, Arctic, were analyzed to evaluate the optimal growth conditions and contents of fatty acids. The optimal growth temperature for KNF0022, KNF0024, and KNF0032 is between 4 and 8 °C. Among the three microalgal strains, KNF0032 showed the maximal cell number of 1.6 × 107 cells/mL at 4 °C. The contents of fatty acids in microalgae biomass of KNF0022, KNF0024, and KNF0032 cultured for 75 days were 37.34 mg/g dry cell weight (DCW), 73.25 mg/g DCW, and 144.35 mg/g DCW, respectively. The common fatty acid methyl esters (FAMEs) analyzed from Arctic green microalgae consisted of palmitic acid methyl ester (C16:0), 5,8,11-heptadecatrienoic acid methyl ester (C17:3), oleic acid methyl ester (C18:1), linoleic acid methyl ester (C18:2), and α-linolenic acid methyl ester (C18:3). KNF0022 had high levels of heptadecanoic acid methyl ester (26.58%) and heptadecatrienoic acid methyl ester (22.17% of the total FAMEs). In KNF0024 and KNF0032, more than 72.09% of the total FAMEs consisted of mono- and polyunsaturated fatty acids. Oleic acid methyl ester from KNF0032 was detected at a high level of 20.13% of the FAMEs. Arctic freshwater microalgae are able to increase the levels of polyunsaturated fatty acids under a wide range of growth temperatures and can also be used to produce valuable industrial materials.
URI
http://repository.kopri.re.kr/handle/201206/7436
DOI
http://dx.doi.org/10.4490/algae.2016.31.2.8
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