Effect of Exogenous Ethylene (ET) on Regulating Carotenogenesis Expression and Astaxanthin Accumulation in Haematococcus pluvialis

文献类型： 外文期刊

第一作者： Gao, Zhengquan

作者： Gao, Zhengquan;Meng, Chunxiao;Gao, Hongzheng;Su, Yuanfeng;Zhao, Yuren;Wang, Yuanyuan;Ye, Naihao;Zhang, Xiaowen

作者机构：

关键词： Haematococcus pluvialis;Astaxanthin;Ethylene (ET);Regulation;Carotenoid genes;Real-time fluorescence quantitative PCR (qRT-PCR)

期刊名称：JOURNAL OF PURE AND APPLIED MICROBIOLOGY （ 影响因子：0.073； ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The freshwater eukaryotic unicellular alga Haematococcus pluvialis is one of the best sources to produce natural astaxanthin in nature. However, the regulatory role of carotenogenesis leading to astaxanthin formation is not well understood. In this study, the effects of ET on transcriptional expressions of eight carotenoid genes in H. pluvialis were measured using qRT-PCR. Results showed that eight carotenogenic genes were up-regulated by ET with different expression profiles. Astaxanthin accumulation was promoted efficiently by ET, which might result from the up-regulating of ipi-1, ipi-2, pds, lyc, bkt, crtR-b and crtO at the transcriptional level, and by psy at both transcriptional and post-transcriptional levels. Moreover, fourteen proteins were expressed differentially in ET treatments compared to controls. Furthermore, algal cell division accompanying accompanied by astaxanthin accumulation for the first time during the whole course of ethylene induction. The knowledge in the present paper might help to optimize the physiological conditions needed to produce a high yield of astaxanthin with ET.

分类号： Q93

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