您好，欢迎访问中国水产科学研究院 机构知识库！
中国水产科学研究院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Dual impacts of elevated pCO2 on the ecological effects induced by microplastics and nanoplastics: A study with Chlamydomonas reinhardtii

文献类型： 外文期刊

作者： Liang, Chengwei 1 ; Liu, Yajing 1 ; Xi, Tianle 1 ; Liu, Jia 1 ; Ge, Shanshan 2 ; Zhang, Xiaowen 3 ; Jia, Zhihua 1 ; Ye, Naihao 3 ;

作者机构： 1.Qingdao Univ Sci & Technol, Coll Biol Engn, Qingdao 266042, Peoples R China

2.Marine Sci Res Inst Shandong Prov, Shandong Key Lab Intelligent Marine Ranch Under pr, Qingdao 266104, Peoples R China

3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

4.Qingdao Natl Lab Marine Sci & Technol Ctr, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266071, Peoples R China

关键词： Micro-and nanoplastics; and nanoplastics; Freshwater acidification; Combined toxicity; Mechanisms; Oxidative stress; Chlamydomonas reinhardtii

期刊名称：AQUATIC TOXICOLOGY （ 影响因子：4.3； 五年影响因子：4.4 ）

ISSN： 0166-445X

年卷期： 2025 年 283 卷

页码：

收录情况： SCI

摘要： Aquatic organisms face increased complexity and severity when exposed to the combined stressors of climate change and micro-and nanoplastics (MNPs), as opposed to facing these stressors individually. This study examined the effects and underlying mechanisms of elevated pCO2, which leads to freshwater acidification, as well as amino-modified polystyrene MNPs (PS-NH2 MNPs) of varying sizes (5 mu m, 300 nm, 80 nm), on Chlamydomonas reinhardtii under both individual and combined conditions. The results showed a size-dependent toxicity of PS MNPs, with the smaller nanoparticles (80 nm) causing greater toxic inhibition than the larger microparticles (5 mu m and 300 nm), primarily attributed to oxidative stress-related cellular damage. In contrast, freshwater acidification (FA) appeared to promote the growth of C. reinhardtii, possibly by upregulating transcripts associated with energy metabolism. However, when C. reinhardtii was exposed to both FA and MNPs simultaneously, distinct toxic effects were observed. The co-exposure to FA and NPs induced the most severe oxidative stress, implying the greatest energetic cost. This stress resulted in the downregulation of pathways involved in fatty acid biosynthesis and protein folding, ultimately causing significant damage to cellular structure and function. The increased energy from the upregulation of the TCA cycle was mainly allocated for DNA damage repair and cell division, which induced an energy deficit necessary for stress resistance. In contrast, during co-exposure to FA and MPs, energy was redirected towards DNA replication and the synthesis of anti-stress substances, facilitating recovery and promoting growth. Our study highlighted the decisive influence of climate change and particle size in assessing the ecological effects and risks associated with MNPs.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国水产科学研究院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台