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A rare ?-8 fatty acid, cis-8,4,11-docosatrienoic acid rich microalgal strain isolated from a salt lake in Tibet Plateau br

文献类型： 外文期刊

作者： Han, Zhiping 1 ; Moh, Edward S. X. 3 ; Peng, Yuanhuai 1 ; Wang, Sheng 1 ; Jin, Bei 1 ; Huang, Ying 1 ; Ye, Jianzhi 2 ;

作者机构： 1.Lingnan Normal Univ, Coll Food Sci & Engn, Zhanjiang, Guangdong, Peoples R China

2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang, Guangdong, Peoples R China

3.Macquarie Univ, ARC Ctr Excellence Synthet Biol, Sch Nat Sci, Sydney, NSW, Australia

4.48 Renmin Rd, Zhanjiang 524001, Guangdong, Peoples R China

关键词： Plateau microalgae; Desmodesmus; Salt lake; cis-8; 4; 11-docosatrienoic acid

期刊名称：ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS （ 影响因子：5.276； 五年影响因子：5.813 ）

ISSN： 2211-9264

年卷期： 2022 年 66 卷

页码：

收录情况： SCI

摘要： A new green microalga was isolated from a salt lake in Tibet Plateau, China, classified as genus Desmodesmus under the family of Scenedesmaceae based on morphological and 18S rDNA sequencing. The species was able to grow at both 4 and 25 degrees C, due to differences to the biochemical composition. At 25 degrees C, protein content made up 50 % in dry biomass, while at 4 degrees C lipids made up 55 % of dry biomass. A poly unsaturated fatty acid, cis-8,11,14- docosatrienoic acid (C22:3, 8,11,14-DTA), was identified in D. sp. QL96 cultured under both temperature con-ditions. This fatty acid has been reported to be physiologically functional, however yield from natural sources was low and limited the related research and application. GC analysis indicated that 8,11,14-DTA was the third abundant fatty acid in D. sp. QL96, accounting for around 20 % out of the total lipid. The effects of environ-mental factors on the production of 8,11,14-DTA was studied and productivity of 8,11,14-DTA was optimized to achieve 10.91 mg/L per day. To our knowledge, the plateau alga is the most productive natural source of 8,11,14-DTA. This study provides the groundwork for further study and processing of this fatty acid.

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