Modification of fatty acid composition in halophilic Antarctic microalgae

被引：13

作者：

Xu, XQ ^{[1
]}

Beardall, J ^{[1
]}

Hallam, ND ^{[1
]}

机构：

[1] Monash Univ, Dept Ecol & Evolut Biol, Clayton, Vic 3168, Australia

来源：

PHYTOCHEMISTRY | 1998年 / 49卷 / 05期

关键词：

Dunaliella; Chlorophyceae; fatty acids; salinity; sorbitol; osmotic pressure; microalga; Antarctica;

D O I：

10.1016/S0031-9422(98)00117-4

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The major fatty acids in two Dunaliella isolates originating from Antarctic hypersaline lakes were 18:3 omega 3, 16:0, 16:4 omega 3. 18:1 omega 9, 18:2 omega 6, and 16:1 omega 7. The relative amount of individual fatty acids was modified by partially,or fully replacing ionic osmotic pressure (Na+, K+ and Cl-) with molecular osmotic pressure (sorbitol) in the growth medium. The effects of sorbitol on the extent of cellular fatty acid unsaturation differed in the two isolates. The results suggest that the appropriate environment necessary for the growth of these "halophilic" species is a certain level of osmotic pressure in the medium, but that this can be provided by either ionic or molecular osmotic pressure, or a mixture of both. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1249 / 1252

页数：4

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