Cellular growth and fatty acid content of Arctic green microalgae
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- Cellular growth and fatty acid content of Arctic green microalgae
- Jung, Woongsic
Kim, Eun Jae
Han, Se Jong
- Plant Sciences; Marine & Freshwater Biology
- Arctic; Chlamydomonadalean; Fatty acid methyl ester; Microalgae; Psychrophilic
- Issue Date
- Jung, Woongsic., et al. 2016. Cellular growth and fatty acid content of Arctic green microalgae. Algae, 31(1): 61-72.
- 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 was between 4 and 8°C. Among the three microalgal strains, KNF0032 showed the maximal cell number of 1.6 × 107 cells mL-1 at 4°C. The contents of fatty acids in microalgae biomass of KNF0022, KNF0024, and KNF0032 cultured for 75 days were 37.34, 73.25, and 144.35 mg g-1 dry cell weight, 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.
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