期刊
CHEMOSPHERE
卷 308, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.136135
关键词
Microplastics; Chlorella pyrenoidosa; Photosynthesis; Aggregation; Oxidative stress
资金
- National Natural Science Foundation of China [31902411]
- Jiangsu Agriculture Science and Technology Inno- vation Fund [CX (21) 3159]
This study explores the toxic effects of different sizes of microplastics on Chlorella pyrenoidosa, finding that 1 micrometer microplastics significantly inhibit the growth of the algae and alter the expression of genes related to photosynthesis and energy metabolism.
Microplastics (MPs) are persistent environmental contaminants. The toxic effects of MPs on aquatic organisms have raised increasing concerns, but their toxic effects on aquatic phytoplankton has not been thoroughly investigated. In the present study, the toxic effects of two sizes MPs (1 mu m and 5 mu m) on Chlorella pyrenoidosa at 2, 10, 50 mg/L were explored for 1, 5, 10 days. The growth ratio, photosynthetic pigments content, extracellular polymeric substances content, soluble protein content, MDA content and relative expression of genes related to photosynthesis and energy metabolism were measured. These results indicated that 1 mu m MP could significantly inhibit the growth of C. pyrenoidosa. Compared with the control group, 1 mu m MP significantly reduced the photosynthetic pigment content, induced oxidative stress and disrupted the cell membrane integrity of C. pyrenoidosa. At the molecular level, 1 mu m MP altered the transcript levels of genes related to photosynthesis and energy metabolism. Scanning electron microscopy and fluorescent images showed that MPs aggregation with C. pyrenoidosa may be the main reason for the toxic effects of MPs. These results will provide new insight into the toxicity of different MPs on aquatic phytoplankton, and evaluate the risks caused by MPs in aquatic environments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据