Physiological and ecological responses and changes of Phaeodactylum tricornutum under long-term stress of naphthalene

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Cong, Sha^1^2 ; Yuelu, Jiang^1

Graduate School at Shenzhen, Tsinghua University, Shenzhen

518000, China^1

School of Environment, Tsinghua University, Beijing

100000, China^2

关键词: Ecological response;    Phaeodactylum tricornutum;    Photochemical efficiency;    Photosynthetic efficiency;    Physiological characteristics;    Polycyclic aromatic hydrocarbons (PAHS);    Reactive oxygen species;    Total esterase activity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/5/052021/pdf
DOI  :  10.1088/1755-1315/310/5/052021

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Naphthalene, as a common polycyclic aromatic hydrocarbon (PAHs), attracts broad attention due to its toxicity to human and marine organisms. This study investigate the effects of naphthalene on growth, maximum photochemical efficiency (F v /F m), total esterase activity and reactive oxygen species production of Phaeodactylum tricornutum. The study explored how algal physiological characteristics change under naphthalene's long-term exposure and analyzed the correlation between photosynthetic efficiency with growth, total esterase activity and reactive oxygen species production, respectively. The study shows that low-concentration naphthalene promotes slightly or doesn't affect algal growth, total esterase activity and reactive oxygen species while it promotes F v /F m significantly. On the other hand, high-concentration naphthalene inhibits algal growth, total esterase activity and F v /F m significantly, while it stimulates reactive oxygen species production and the stimulation increases with time. The study also shows that growth and Fv/Fm of P. tricornutum are correlative and the correlation is related with naphthalene concentration. F v /F m of P. tricornutum is significantly positively-related with total esterase activity, while is significantly negatively-related with reactive oxygen species.