State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China.
University of Chinese Academy of Sciences, Beijing, 10039, People's Republic of China.
Bull Environ Contam Toxicol. 2021 Apr;106(4):575-582. doi: 10.1007/s00128-020-03097-0. Epub 2021 Feb 2.
Decabromodiphenyl ether (BDE-209), a member of a major group of brominated flame retardants, is detected in aquatic environments at considerable levels and induces physiological and toxic effects on aquatic plants. In this study, the physiological responses induced by and the toxic effects of BDE-209 at different concentrations (0, 0.2, 0.5 and 1.0 mg L) in Lythrum salicaria were examined. OJIP transient curves indicated that BDE-209 treatment negatively affected photosystem II (PSII) grouping. Additionally, the results showed that BDE-209 inhibited seedling development and elevated reactive oxygen species (ROS), phosphorylated histone H2AX (γ-H2AX), malondialdehyde (MDA) levels and antioxidative enzyme activities in the roots and shoots of L. salicaria. The results revealed that BDE-209 exposure contributed to ROS accumulation, which was considered as the probable toxicity mechanism. The current results provided an insight into the development of L. salicaria with high BDE-209 tolerance.
十溴二苯醚（BDE-209）是溴系阻燃剂的主要成分之一，在水生环境中被检测到相当高的浓度，并对水生植物产生生理和毒性影响。在本研究中，研究了不同浓度（0、0.2、0.5 和 1.0 mg/L）的 BDE-209 对千屈菜的生理响应和毒性作用。OJIP 瞬变曲线表明，BDE-209 处理对光系统 II（PSII）产生负面影响。此外，结果表明，BDE-209 抑制了千屈菜幼苗的发育，并在根和茎中增加了活性氧（ROS）、磷酸化组蛋白 H2AX（γ-H2AX）、丙二醛（MDA）水平和抗氧化酶活性。结果表明，BDE-209 暴露导致 ROS 积累，这被认为是可能的毒性机制。本研究结果为开发具有高 BDE-209 耐受性的千屈菜提供了新的见解。
