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学科主题: Biotechnology & Applied Microbiology
题名: Growth-associated biosynthesis of astaxanthin in heterotrophic Chlorella zofingiensis (Chlorophyta)
作者: Wang, Y ; Peng, J
通讯作者: ywang@yic.ac.cn
关键词: astaxanthin ; Chlorella zofingiensis ; glucose ; heterotrophic culture
刊名: WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
发表日期: 2008
卷: 24, 期:9, 页:1915-1922
收录类别: sci
部门归属: [Wang, Y.] Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev, Yantai 264003, Shandong, Peoples R China; [Wang, Y.; Peng, J.] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China
摘要: The green microalga Chlorella zofingiensis can produce the ketocarotenoid astaxanthin under heterotrophic culture conditions. Here we report the growth-associated biosynthesis of astaxanthin in this biotechnologically important alga. With glucose as sole carbon and energy source, C. zofinginesis grew fast in the dark with rapid exhaustion of nitrogen and carbon sources from media, leading to a high specific growth rate (0.034 h(-1)). Cultures started at a cell concentration of about 3.4 x 10(9) cells l(-1) reached, after 6 days, standing biomass values of 1.6 x 10(11) cells or 8.5 g dry weight l(-1). Surprisingly, the biosynthesis of astaxanthin was found to start at early exponential phase, independent of cessation of cell division. A general trend was observed that the culture conditions benefiting cell growth also benefited astaxanthin accumulation, indicating that astaxanthin was a growth-associated product in this alga. The maximum cell dry biomass and astaxanthin yield were 11.75 g l(-1) and 11.14 mg l(-1) (about 1 mg g(-1)), simultaneously obtained in the fed-batch culture with a combined glucose-nitrate mixture addition, which were the highest ever reported in dark-heterotrophic algal cultures. The possible reasons why dark-heterotrophic C. zofingiensis could produce astaxanthin during the course of cell growth were discussed.
原文出处: 查看原文
WOS记录号: WOS:000257961500036
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5364
Appears in Collections:海洋生物_期刊论文

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Recommended Citation:
Wang, Y; Peng, J.Growth-associated biosynthesis of astaxanthin in heterotrophic Chlorella zofingiensis (Chlorophyta),WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY,2008,24(9):1915-1922
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