13 research outputs found
Antibiofilm, Antioxidant, Antimutagenic Activities and Phenolic Compounds of Allium orientale BOISS.
Toxicological Effects of Three Polybromodiphenyl Ethers (BDE-47, BDE-99 and BDE-154) on Growth of Marine Algae Isochrysis galbana
Polybrominated diphenyl ethers (PBDEs)
are highly persistent anthropogenic contaminants
found in trace amounts in many environmental compartments
far from their source areas, posing a risk to
aquatic ecosystems. Our objective was to determine
the relative toxicities of three BDEs, BDE-47, BDE-
99 and BDE-154 on marine phytoplankton algae
Isochrysis galbana. For a highly sensitive endpoint:
the 72-h inhibition of autotrophic growth rate was
calculated according to standards methods. Actual
PBDE concentration was measured by GC-MS and
toxicity parameters were calculated on the basis of
time-weighted mean actual concentrations. No observable
effect concentration (NOEC) values were
2.53 μg L−1 for BDE-47, 3.48 μg L−1 for BDE-99 and
12.3 μg L−1 for BDE-154, and LOEC values were 5.06,
6.96 and 24.60 μg L−1 for BDE-47, BDE-99 and BDE-
154, respectively. The calculated IC10 (the concentration
inhibiting growth rate by 10 %) corresponded to 9.3,
12.78 and 54.6 μg L−1 for BDE-47, BDE-99 and BDE-
154, respectively. The 50 % inhibitions of growth rate (IC50) values were: 25.7 μg L−1 BDE-47, 30.0 μg L−1
BDE-99 and 243.7 μg L−1 BDE-154. Therefore, the acute
toxicity of PBDEs decreases as the degree of bromination
increases, the order of toxicity is BDE-47>BDE-99>
BDE-154. Significant (p<0.05) adverse effects were observed
for all compounds at concentrations >15 μg L−1.
Our results indicated that under laboratory conditions
PBDEs inhibited the growth of marine phytoplankton at
concentrations near 10 μg L−1. However, further work is
required to investigate long-term effects in these and other
aquatic organisms.MAE-PCI MCINN CTM2009-10908Versión del editor1,748