Carotenoid genes transcriptional regulation for astaxanthin accumulation in fresh water unicellular alga Haematococcus pluvialis by gibberellin A3 (GA(3))
文献类型： 外文期刊
作者： Gao, Zhengquan 1 ; Meng, Chunxiao 1 ; Gao, Hongzheng 1 ; Li, Yan 2 ; Zhang, Xiaowen 3 ; Xu, Dong 3 ; Zhou, Shitan 1 ; Liu 1 ;
作者机构： 1.Shandong Univ Technol, Sch Life Sci, Zibo 255049, Peoples R China
2.James Cook Univ, Sch Marine & Trop Biol, Townsville, Qld 4811, Australia
3.Chinese Acad Fishery Sci, Yellow Sea Fishery Res Inst, Qingdao 266071, Peoples R China
关键词： Haematococcus pluvialis;Astaxanthin;Gibberellin A3 (GA(3));Carotenoid genes;Real-time fluorescence quantitative PCR
期刊名称：INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS （ 影响因子：1.918； 五年影响因子：1.406 ）
ISSN： 0301-1208
年卷期： 2013 年 50 卷 6 期
页码：
收录情况： SCI
摘要： The fresh water unicellular alga Haematococcus pluvialis is a promising natural source of astaxanthin. The present study investigated the transcriptional expression of carotenoid genes for astaxanthin accumulation in H. pluvialis using real-time fluorescence quantitative PCR (qRT-PCR). With treatments of 20 and 40 mg/L of gibberllin A(3) (GA(3)), five genes ipi-1, ipi-2, psy, pds and bkt2 were up-regulated with different expression profiles. GA20 (20 mg/L of GA(3)) treatment had a greater effect on transcriptional expression of bkt2 than on ipi-1 ipi-2, psy and pds (>4-fold up-regulation). However, GA40 (40 mg/L of GA,) induced more transcriptional expression of ipi-2, pry and bkt2 than both ipi-1 and pds. The expression of lyc, crtR-B and crtO for astaxanthin biosynthesis was not affected by GA(3) in H. piuvialis. In the presence of GA(3), astaxanthin biosynthesis genes of ipi-1, pds and bkt2 were up-regulated at transcriptional level, pry at post-transcriptional level, whereas ipi-2 was up-regulated at both levels. The study could potentially lead to a scale application of exogenous GA(3) in astaxanthin production with H. pluvialis just like GAs perform in increasing crops production and it would provide new insight about the multifunctional roles of carotenogenesis in response to GA(3).
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