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题名: Physiological responses of freshwater oleaginous microalgae Desmodesmus sp NMX451 under nitrogen deficiency and alkaline pH-induced lipid accumulation
作者: Xia, Ling1, 2; Yang, Haijian1, 2; He, Qiaoning1, 2; Hu, Chunxiang1
通讯作者: Hu, CX (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China.
关键词: Desmodesmus sp NMX451 ; Nitrogen deficiency ; Bicarbonate addition ; Oil accumulation ; Microalgae cultivation
刊名: JOURNAL OF APPLIED PHYCOLOGY
发表日期: 2015-04-01
DOI: 10.1007/s10811-014-0371-x
卷: 27, 期:2, 页:649-659
收录类别: SCI
文章类型: Article
部门归属: [Xia, Ling ; Yang, Haijian ; He, Qiaoning ; Hu, Chunxiang] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China ; [Xia, Ling ; Yang, Haijian ; He, Qiaoning] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
研究领域[WOS]: Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
英文摘要: Many microalgae are reported to accumulate TAG under high concentrations of bicarbonate and nitrogen deficiency, but their physiological responses remain unknown and the associated applied technology is rarely explored. We found that single high concentration of bicarbonate did not enhance lipid content, except when combined with nitrogen limitation in Desmodesmus sp. NMX451, and the lipid contents obtained were independent from nitrogen limitation and alkalinity stress. Further analysis showed that adding bicarbonate not only retarded the cell cycle, repressed starch accumulation but also promoted polar lipid content. Nitrogen limitation meantime caused protein and chlorophyll degradation with a corresponding increase in total lipid content. Following the aforementioned insights, combined cultivation was performed at an outdoor 5 L scale, and higher biomass and lipid productivities were obtained. These results suggest that bicarbonate can be used as a "trigger" for rapid lipid accumulation in microalgae during nitrogen depletion, and this is an effective new strategy for the cultivation of oleaginous microalgae.
关键词[WOS]: DIATOM PHAEODACTYLUM-TRICORNUTUM ; CHLORELLA SP CHLOROPHYTA ; CARBON-DIOXIDE LEVELS ; TRIACYLGLYCEROL ACCUMULATION ; CHLAMYDOMONAS-REINHARDTII ; INORGANIC CARBON ; DIFFERENT TEMPERATURE ; BAG PHOTOBIOREACTORS ; TETRASELMIS-SUECICA ; OIL ACCUMULATION
语种: 英语
WOS记录号: WOS:000352446200003
ISSN号: 0921-8971
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/25763
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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