Exopolysaccharide from Haematococcus pluvialis enhances photosynthesis, biomass and astaxanthin accumulation☆
文献类型：期刊论文
| 作者 | Chen, Feng2,4; Zhang, Litao2,3; Guo, Shuju2,3; Yu, Wenjie2,3; Li, Jing2,4; Liu, Jianguo1,2,3 |
| 刊名 | ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 90页码:9 |
| 关键词 | Exopolysaccharide Haematococcus pluvialis Astaxanthin Photosynthesis Guluronic acid |
| ISSN号 | 2211-9264 |
| DOI | 10.1016/j.algal.2025.104120 |
| 通讯作者 | Liu, Jianguo(jgliu@qdio.ac.cn) |
| 英文摘要 | Haematococcus pluvialis is recognized as the prime biological source of natural astaxanthin. However, the physiological and metabolic effects of H. pluvialis exopolysaccharide (HPEPS), which is derived from both secretion and cell wall dissolution during cell growth and transformation, remain unclear. This study systematically elucidated the regulatory effects of HPEPS on astaxanthin biosynthesis in H. pluvialis through physiological and metabolomics analyses, and preliminary characterization of its structure was also performed. Under high light stress, exogenous supplementation of 220 mg/L HPEPS induced cell division arrest and increased cell diameter to 1.25-fold of the original size, thereby providing space for biomass and astaxanthin accumulation. Concurrently, it enhanced photosynthetic efficiency and maintained energy metabolic homeostasis, leading to 1.36-fold, 1.82-fold, and 2.6-fold increases in biomass, astaxanthin yield, and astaxanthin content, respectively. Integrated metabolomics analysis revealed that HPEPS activation enhances carbon assimilation, photorespiration, and glyoxylate cycle pathways to enhance precursor supply for astaxanthin biosynthesis. Structural elucidation further identified HPEPS as a heteropolysaccharide primarily containing guluronic acid (GulA, 37.4 %), galactose (18.9 %), and arabinose (12.0 %). Notably, this work reports the first detection of GulA in microalgal exopolysaccharides. Overall, this study not only provides a theoretical basis for elucidating the structural composition and physiological role of HPEPS, but also develops a new approach to optimize the production of natural astaxanthin. |
| WOS关键词 | CELL-WALL ; PHOTORESPIRATION ; MICROALGAE ; ANTIOXIDANT |
| 资助项目 | TS Industrial Experts Program[LJNY202102] ; National Natural Science Foundation of China[32370409] ; National Natural Science Foundation of China[32302979] ; Science & Technology Specific Projects in Agricultural High-tech Industrial Demonstration Area of the Yellow River Delta[2022SZX12] ; Yunnan Science and Technology Talent Development[2] ; Science and Technology Talent and Platform Program: Expert Workstation Project[81] |
| WOS研究方向 | Biotechnology & Applied Microbiology |
| 语种 | 英语 |
| WOS记录号 | WOS:001506739300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/202268]  |
| 专题 | 海洋研究所_实验海洋生物学重点实验室 |
| 通讯作者 | Liu, Jianguo |
| 作者单位 | 1.Natl Ctr Technol Innovat Comprehens Utilizat Salin, Academician Workstn Agr High Tech Ind Area Yellow, Dongying 257300, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Breeding Biotechnol & Sustainable Aquacult, 88 Haijun Rd, Qingdao 266404, Peoples R China 3.Qingdao Marine Sci & Technol Ctr, Lab Marine Biol & Biotechnol, 168 Wenhai Rd, Qingdao 266237, Peoples R China 4.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao 266404, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Feng,Zhang, Litao,Guo, Shuju,et al. Exopolysaccharide from Haematococcus pluvialis enhances photosynthesis, biomass and astaxanthin accumulation☆[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2025,90:9. |
| APA | Chen, Feng,Zhang, Litao,Guo, Shuju,Yu, Wenjie,Li, Jing,&Liu, Jianguo.(2025).Exopolysaccharide from Haematococcus pluvialis enhances photosynthesis, biomass and astaxanthin accumulation☆.ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,90,9. |
| MLA | Chen, Feng,et al."Exopolysaccharide from Haematococcus pluvialis enhances photosynthesis, biomass and astaxanthin accumulation☆".ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS 90(2025):9. |
入库方式： OAI收割
来源：海洋研究所
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