Comparative transcriptome analysis of Haematococcus pluvialis on astaxanthin biosynthesis in response to irradiation with red or blue LED wavelength 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
World Journal of Microbiology & Biotechnology
年/卷/期
2018 / 34 / 7
ISSN号
0959-3993
作者单位
World Inst Kimchi, Microbiol & Funct Res Grp, Gwangju 61755, South Korea;Korea Atom Energy Res Inst, Adv Radiat Technol Inst, 1266 Sinjeong, Jeongeup 580185, Jeonbuk, South Korea;Korea Atom Energy Res Inst, Adv Radiat Technol Inst, 1266 Sinjeong, Jeongeup 580185, Jeonbuk, South Korea;Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea;Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea;
作者
Lee, Changsu;Ahn, Joon-Woo;Kim, Jin-Baek;Kim, Jee Young;Choi, Yoon-E;
摘要
The unicellular green microalga Haematococcus pluvialis has the highest content of the natural antioxidant, astaxanthin. Previously, it was determined that astaxanthin accumulation in H. pluvialis could be induced by blue-wavelength irradiation; however, the molecular mechanism remains unknown. The present study aimed to compare the transcriptome of H. pluvialis, with respect to astaxanthin biosynthesis, under the monochromatic red (660 nm) or blue (450 nm) light-emitting diode (LED) irradiation. Among a total of 165,372 transcripts, we identified 67,703 unigenes, of which 2245 and 171 were identified as differentially expressed genes (DEGs) in response to blue and red irradiation, respectively. Interestingly, expressional changes of blue light receptor cryptochromes were detected in response to blue and/or red LED irradiation in H. pluvialis, which may directly and indirectly regulate astaxanthin biosynthesis. In accordance with this observation, expression of the BKT and CHY genes, which are part of the downstream section of the astaxanthin biosynthetic pathway, was significantly upregulated by blue LED irradiation compared with their expression under control white irradiation. Contrastingly, they were downregulated by red LED irradiation. Our transcriptome study provided molecular insights that highlighted the different of responses of H. pluvialis to red and blue irradiation, especially for astaxanthin biosynthesis.
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关键词/主题词
Gene expression;Carotenoid biosynthesis;Differentially expressed genes;Microalgae;LED wavelength;
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