文献类型：期刊文献

英文题名：Regulatory mechanism of high-concentration CO2 on polysaccharide accumulation in Tetradesmus obliquus cultured in sludge extract

作者：Chen, Xiurong[1,2];Ding, Biao[1,2];Zhang, Xinyu[1,2];Yu, Jiayu[1,2];Song, Meijing[1,2];Li, Renjie[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2023

卷号：30

期号：22

起止页码：62867

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;EI(收录号：20242616341500);WOS:【SCI-EXPANDED(收录号:WOS:000984167900003)】；

基金：This research was supported by the National Natural Science Foundation (No. 51878278)

语种：英文

外文关键词：Sludge extract; Highly toxic organic matters; Carbon dioxide; Tetradesmus obliquus; Polysaccharide; Proteomics

摘要：Microalgae such as Tetradesmus obliquus have great potential in immobilizing high-concentration CO2 and removing highly toxic organic matters, which could be produced from coal chemical industry and coal chemical wastewater biological treatment process. In this study, Tetradesmus obliquus was cultured in sludge extract and high-concentration CO2 was added. The maximum cell density and dry weight were respectively (111.46 +/- 4.87) x 10(6) cell/mL and 3.365 +/- 0.168 g/L under 30% CO2. Tetradesmus obliquus accumulated the most polysaccharides (629.60 +/- 31.48 mg/L) on the 30th day under 30% CO2. The results of proteomic showed that the upregulation of A0A2Z4THB7 and A0A383VAT1 promoted polysaccharide accumulation. Polysaccharide was mainly formed at the stable phase instead of the log-growth phase due to the abiotic stress caused by high TOC at the log-growth phase. Collectively, this study revealed the regulatory mechanism of high-concentration CO2 on the toxicity removal and accumulation of polysaccharides in Tetradesmus obliquus.