文章基本信息

标题：TOXIC EFFECTS OF 1,4-DICHLOROBENZENE ON CHLORELLA PYRENOIDOSA: CELL MORPHOLOGY, ANTIOXIDANT SYSTEM, AND MEMBRANE PERMEABILITY
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作者：Jinhua Zhang ; Jia Feng ; Jin Cai 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：3
页码：1933-1940
语种：English
出版社：PSP Publishing
摘要：1,4-dichlorobenzene (1,4-DCB) is a common organic contaminant in water. To investigate its toxic effects on algae, we evaluated the responses of Chlorella pyrenoidosa treated with 1,4-DCB. The results showed that algal growth was inhibited in a time- and concentration-dependent manner. After treatment with high concentrations of 1,4-DCB (> 10 mg/L), C. pyrenoidosa underwent cell wall disintegration, cell membrane disruption, and chloroplast and pyrenoid deformation. Low concentrations of 1,4-DCB (< 5 mg/L) enhanced the activities of peroxidase and superoxide dismutase, but higher concentrations (> 10 mg/L) caused a sharp decline as a result of reactive oxygen species accumulation. Malonaldehyde content and relative conductivity increased significantly over time at the higher treatment concentrations. We conclude that1,4-DCB exerts toxic effects on cell morphology, the antioxidant system, and membrane permeability in C. pyrenoidosa, especially at concentrations exceeding 10 mg/L.
关键词：Chlorellap;yrenoidosa71,4-dichlorobenzene;toxic effects;cell morphology;antioxidant system;membrane permeability