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Comparison of heat resistance and application potential of two lipid-rich Isochrysis galbana strains
Li, Ling1,2,3; Zhang, Litao1,2; Zhang, Zhen1; Liu, Jianguo1,2,3
2016-12-01
发表期刊ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
卷号20页码:1-6
文章类型Article
摘要Isochrysis galbana is considered to be a promising candidate for biodiesel feedstock for its fast growth and high lipid content. Outdoor mass cultivation of this species often suffers from heat stress, especially at noon in summer, thus screening of heat-resistant strains is essential. The heat resistance and application potential of two I. galbana strains IOAC683S and IOAC724Swere compared for their growth characteristics, Hsp90 gene expression, photoprotective mechanism, fatty acid profile and lipid productivity at 25 degrees C, 30 degrees C and 35 degrees C. Cell density, total chlorophyll and biomass of strain IOAC683S increased at 25 degrees C and 30 degrees C, while decreased at 35 degrees C. In contrast, all these indexes of strain IOAC724S increased gradually in all three temperatures during 144 h culture period. The HSP90 mRNA expression levels of strain IOAC683S increased significantly after cultured at 35 degrees C for 24 h (P < 0.05), but that of strain IOAC724S did not increase significantly at 72 h at 35 degrees C compared with 25 degrees C (P < 0.05). These results indicated that strain IOAC724S was more resistant to 35 degrees C than strain IOAC683S. It was found that, the lower chlorophyll content per cell in IOAC724S could reduce the light energy absorption, and higher non-photochemical energy quenching (NPQ) and alternative electron flow with PSII (AEF-II) could efficiently dissipate excess light energy, therefore protect it against photodamage at high temperature of 35 degrees C. In addition, strain IOAC724S has higher lipid productivity than strain IOAC683S, giving this unicellular alga potential for outdoor commercial cultivation for biofuel production. (C) 2016 Elsevier B.V. All rights reserved.
关键词Isochrysis Galbana Heat Resistance Photoprotective Mechanisms Lipid Productivity Mass Cultivation
DOI10.1016/j.algal.2016.09.002
收录类别SCI
语种英语
WOS记录号WOS:000390560000001
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136259
专题海洋生物技术研发中心
作者单位1.Chinese Acad Sci, Inst Oceanol, Natl & Local Joint Engn Lab Ecol Mariculture, Key Lab Expt Marine Biol, Qingdao 266071, Shandong, Peoples R China
2.Chinese Acad Sci, Nantong Branch, Inst Oceanol, Nantong 226004, Jiangsu, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266200, Shandong, Peoples R China
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Li, Ling,Zhang, Litao,Zhang, Zhen,et al. Comparison of heat resistance and application potential of two lipid-rich Isochrysis galbana strains[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2016,20:1-6.
APA Li, Ling,Zhang, Litao,Zhang, Zhen,&Liu, Jianguo.(2016).Comparison of heat resistance and application potential of two lipid-rich Isochrysis galbana strains.ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,20,1-6.
MLA Li, Ling,et al."Comparison of heat resistance and application potential of two lipid-rich Isochrysis galbana strains".ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS 20(2016):1-6.
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