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Simultaneous improvement of astaxanthin and lipid production of Haematococcus pluvialis by using walnut shell extracts

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机构： [a]Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China [b]The First People's Hospital of Yunnan Province, Kunming, 650228, China [c]Yunnan Academy of Forestry and Grassland, Kunming, 650051, China

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关键词： Astaxanthin Haematococcus pluvialis Light‑oxygen-voltage histidine kinase Lipids Reactive oxygen species Walnut shell extracts

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The current study examined the effect of walnut shell extracts (WSE) on simultaneous astaxanthin and lipid production by Haematococcus pluvialis under abiotic stress. After supplementation with 15% WSE, the contents of astaxanthin and lipids were enhanced by 77.57% and 23.39%, respectively, compared with the control. The chlorophyll, carbohydrate and protein contents decreased, and the transcription levels of carotenogenic and lipogenic genes, as well as the levels of the reactive oxygen species (ROS), glutathione (GSH) and light‑oxygen-voltage histidine kinase (LOV-HK), all increased. Further investigation showed that LOV-HK regulated astaxanthin and lipid biosynthesis by mediating carotenogenesis, lipogenesis and ROS signalling. Overall, the present study demonstrated that microalgae cultivation coupled with walnut shell recycling is an effective strategy for hyper-accumulation of astaxanthin and lipids and that there is a pivotal interaction between LOV-HK and ROS in WSE-induced regulation of astaxanthin and lipid synthesis in H. pluvialis. © 2020 Elsevier B.V.

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出版当年[2021]版：

大类 | 2 区生物

小类 | 2 区生物工程与应用微生物

最新[2023]版：

大类 | 2 区生物学

小类 | 2 区生物工程与应用微生物

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出版当年[2020]版：

Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

最新[2023]版：

Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

影响因子： 4.6 最新[2023版] 4.8 最新五年平均 4.401 出版当年[2020版] 5.278 出版当年五年平均 4.008 出版前一年[2019版] 5.276 出版后一年[2021版]

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第一作者机构： [a]Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China

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