Response of photosynthesis and the antioxidant defense system of two microalgal species (&ITAlexandrium minutum&IT and &ITDunaliella salina&IT) to the toxicity of BDE-47

被引：43
作者：
Zhao, Yan [1 ]
Wang, You [1 ]
Li, Yijun [2 ]
Santschi, Peter H. [3 ,4 ]
Quigg, Antonietta [4 ,5 ]
机构：
[1] Ocean Univ China, Dept Marine Ecol, Qingdao 266003, Peoples R China
[2] Qingdao Agr Univ, Coll Life Sci, Qingdao 266109, Peoples R China
[3] Texas A&M Univ, Dept Marine Biol, Galveston, TX 77553 USA
[4] Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA
[5] Texas A&M Univ, Dept Marine Sci, Galveston, TX 77553 USA
来源：
MARINE POLLUTION BULLETIN | 2017年 / 124卷 / 01期
基金：
美国国家科学基金会; 中国博士后科学基金;
关键词：
PBDEs; Dunaliella salina; Alexandrium minutum; Photosynthesis; ROS; Antioxidant systems; POLYBROMINATED DIPHENYL ETHERS; BROMINATED FLAME RETARDANTS; POLYCHLORINATED-BIPHENYLS; OXIDATIVE STRESS; SKELETONEMA-COSTATUM; DAPHNIA-MAGNA; MARINE; ENVIRONMENT; FOOD; BIOACCUMULATION;
D O I：
10.1016/j.marpolbul.2017.07.038
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Polybrominated diphenyl ethers (PBDEs), a persistent organic pollutant are ubiquitous in aquatic ecosystems, which are causing serious environmental concerns. In this study, we chose BDE-47 as a representative PBDEs, to investigate its toxic effects on two microalgal species and the response of their antioxidant system. The results indicated Alexandrium minutum (a dinoflagellate) was more sensitive to BDE-47 than Dunaliella salina (a chlorophyte), as determined by growth rates, cellular structure and photosynthetic parameters. Cellular reactive oxygen species (ROS) levels were significantly elevated under the exposure of BDE-47 in both species, corresponding to an increase of superoxide dismutase (SOD), catalase (CAT) and glutathione reductase (GR) activities, while glutathione peroxidase (GPX) activities decreased in D. salina and increased in A. minutum. The different enzymes responses between the two species indicated different mechanisms in their antioxidant system, and we deduced that A. minutum might have a higher efficiency for scavenging H2O2 than D. salina.
引用
收藏
页码：459 / 469
页数：11
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