Temperature regulates fatty acid desaturases at a transcriptional level and modulates the fatty acid profile in the Antarctic microalga Chlamydomonas sp ICE-L

文献类型： 外文期刊

第一作者： An, Meiling

作者： An, Meiling;Zheng, Zhou;Miao, Jinlai;Mou, Shanli;Zhang, Xiaowen;Ye, Naihao;Cao, Shaona;Xu, Dong;Fan, Xiao;Wang, Yitao

作者机构：

关键词： Chlamydomonas sp ICE-L;FADs;PUFAs;Temperature stress

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2013 年 134 卷

页码：

收录情况： SCI

摘要： Chlamydomonas sp. ICE-L which can thrive in extreme environments of the Antarctic is a major biomass producer. The FAD genes in Chlamydomonas sp. ICE-L were obtained and sequence alignment showed that these genes are homologous to known FADs with conserved histidine motifs. In this study, we analyzed the transcription of five FADs and FA compositions at different temperatures. The results showed that the expressions of Delta 9CiFAD, omega 3CiFAD1 and omega 3CiFAD2 were apparently up-regulated at 0 degrees C, however, the up-regulation of Delta 6CiFAD intensified with rising temperature. Meanwhile, analysis of the FA compositions showed that PUFAs were dominant compositions, accounting for more than 75% TFA in Chlamydomonas sp. ICE-L Furthermore, PUFAs were significantly increased at 0 and 5 degrees C, which may be attributed to higher proportions of C18:3 and C20:3. Moreover, PUFAs were significantly decreased at 15 degrees C whereas SFAs were significantly increased. (C) 2013 Elsevier Ltd. All rights reserved.

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