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Abstract
Tetrabromobisphenol A (TBBPA) is one of the most widely used brominated flame retardants.
In the present study, the accumulation of TBBPA and its consequent biological responses
were examined in coontail (Ceratophyllum demersum L.) over 14 days' exposure. Most
of the TBBPA was accumulated after 4d exposure and TBBPA concentration in plant increased
with increasing TBBPA concentration in growth solution (R(2)=0.99). By using electron
paramagnetic resonance (EPR), we found that the TBBPA exposure significantly increased
total free radicals generation in the plants. A good positive relationship (R(2)=0.99)
was found between the free radicals formation and accumulation level of TBBPA in plant.
Lipid peroxidation was enhanced and chlorophyll content showed declined after TBBPA
exposure. The activities of superoxide dismutase (SOD), peroxidase (POD), and the
contents of glutathione were also detected. The results suggest that TBBPA accumulation
in C. demersum induces oxidative stress and the level of tolerance depends on the
antioxidative capacity of the plants.