标题: Physiological responses and lipid accumulation of freshwater microalgae Chlorella sorokiniana under short-term zinc stress in water solution

作者: Tan, ST (Tan, Sitao); Wen, F (Wen, Fei); Liu, DY (Liu, Dongyang); Lu, HL (Lu, Huiling); Li, LJ (Li, Lanjing); Zhu, LD (Zhu, Liandong)

来源出版物: ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS 卷: 80 文献号: 103528 DOI: 10.1016/j.algal.2024.103528 Published Date: 2024 JUN

摘要: As a potential toxic element, zinc exhibits strong environmental mobility and bioavailability, rendering it a subject of profound concern as a highly toxic pollutant. In this study, the toxic effects of divalent zinc ion (Zn2+) with high concentrations at 5, 10, 15, 20, and 25 mg/L on the physiological states of Chlorella sorokiniana were investigated, including growth inhibition, photosynthesis, oxidative damage, and lipid accumulation. The results unequivocally revealed a substantial inhibition of C. sorokiniana growth in response to above 5 mg/L Zn2+ exposure. The photosynthetic activity and photosynthetic pigment content of C. sorokiniana declined with the increase of Zn2+. However, the photosynthetic activity slowly recovered after 72 h of exposure. Zn2+ induced a rapid increase in reactive oxygen species (ROS) within the microalgae, subsequently stimulating superoxide dismutase activity. Nevertheless, the uneliminated excess ROS disrupted the cell membrane, leading to the production of malondialdehyde. Furthermore, Zn2+ at concentrations of 5 and 20 mg/L positively affected the lipid accumulation, resulting in the highest 4.10 mg/L/d lipid production.

作者关键词: Chlorella sorokiniana; Heavy metal; Lipid accumulation; Toxicity

地址: [Tan, Sitao; Liu, Dongyang; Lu, Huiling; Zhu, Liandong] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm Bi, Wuhan 430079, Peoples R China.

[Tan, Sitao; Liu, Dongyang; Lu, Huiling; Zhu, Liandong] Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Wen, Fei] Xiangyang Ping Healthcare Med Imaging Co Ltd, Xiangyang 441000, Hubei, Peoples R China.

[Li, Lanjing] Univ Auckland, Sch Biol Sci, Auckland, New Zealand.

[Li, Lanjing] Manaaki Whenua Landcare Res, Lincoln, New Zealand.

通讯作者地址: Zhu, LD (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm Bi, Wuhan 430079, Peoples R China.

电子邮件地址: ldzhu@whu.edu.cn

影响因子：4.6