کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1978196 1061531 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metal accumulation and enzyme activities in gills and digestive gland of pearl oyster (Pinctada fucata) exposed to copper
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Metal accumulation and enzyme activities in gills and digestive gland of pearl oyster (Pinctada fucata) exposed to copper
چکیده انگلیسی

The effects of exposure to copper under laboratory-controlled conditions were investigated in the pearl oyster, Pinctada fucata. Metal accumulation and the activity of five enzymes were measured: two immune defense involved enzymes [acid phosphatase (AcPase) and phenoloxidase (PO)], two antioxidant enzymes [superoxide dismutase (SOD) and Se-dependent glutathione peroxidase (Se-GPx)] and one metal-sensitive enzyme [alkaline phosphatase (ALP)]. Analyses were carried out in gills and digestive gland of oysters exposed to 0.05 μM and 0.5 μM copper, respectively, at 12, 24, 48 and 72 h of exposure. The digestive gland of P. fucata was the main copper accumulation organ when oysters were exposed to low concentrations, whereas gills became the target organ in oysters exposed to high concentrations. The adaptation and recovery of the oysters were observed in our study. Levels of the copper accumulation and the sensitivity to copper were the main, if not, part of the reasons for the various responses of the selected enzymes. Se-GPx may potentially be used as biomarkers in biotesting of marine heavy metal pollutions. The enzymatic responses were compared with those of other studies and the possible reasons were discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology - Volume 144, Issue 2, October 2006, Pages 184–190
نویسندگان
, , , ,