کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4422158 1308533 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antioxidant responses in the nereidid Laeonereis acuta (Annelida, Polychaeta) after cadmium exposure
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Antioxidant responses in the nereidid Laeonereis acuta (Annelida, Polychaeta) after cadmium exposure
چکیده انگلیسی

The objective of this study was to evaluate the effects of the exposure to cadmium on the antioxidant responses in the polychaeta Laeonereis acuta. The worms were submitted to 0, 5, and 100 μg of Cd/L during a period of test of 7 days. Cadmium was significantly (p<0.05) accumulated in L. acuta in both concentrations assayed, but the concentration of reactive oxygen and nitrogen species (RONS) increased (p<0.05) only in the group submitted to the highest concentration of cadmium (100 μg/L). At this concentration, a decrease in the activity of the superoxide dismutase and an increase of glutathione-S-transferase activity (p<0.05) was observed. The levels of both lipid peroxides and the activities of catalase and glutathione peroxidase were not affected (p>0.05) by the exposition to cadmium. Thus, cadmium can augment RONS levels and can interfere with the antioxidant defense system of the polychaete L. acuta, although cadmium does not directly induce oxidative stress unlike copper and iron.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 70, Issue 1, May 2008, Pages 115–120
نویسندگان
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