کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9451507 1307825 2005 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cadmium accumulation and Cd-binding proteins in marine invertebrates-A radiotracer study
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Cadmium accumulation and Cd-binding proteins in marine invertebrates-A radiotracer study
چکیده انگلیسی
Tissue and subcellular accumulation of cadmium were studied in different tissues of three marine invertebrates (blue mussel Mytilus edulis, the tunicate Ciona intestinalis and the sea star Asterias rubens) using radioactive 109Cd as a tracer. The organisms were exposed to 0.05, 2 and 50 μg Cd l−1 for 21 days. Quantitative data were obtained by dissecting, weighing and subsequently measuring radioactivity in organs and tissues. Differences between each exposure and each tissue with regard to the amount of radioactivity and metallothionein (MT) content were evaluated. Obvious interspecies differences in Cd accumulation were observed, as well as differences between tissues of the three species. The highest concentrations of Cd in all exposure treatments were found in the hepatopancreas of M. edulis and body wall of A. rubens. Taking all treatments into account, Cd accumulation in the tunic of C. intestinalis was high compared to other tissues from this species. Over 60% of Cd was present in the S50 fraction in all treatments in all three species. Metallothionein levels were increased at the highest Cd-exposure in all species and tissues, except in branchial pharynx of C. intestinalis where the highest MT level was reached following exposure to 2 μg Cd l−1. The most surprising finding was that even the lowest Cd exposure concentration (0.05 μg Cd l−1) caused MT induction in pyloric caeca of A. rubens, but there was no dose-dependent increase in MT at higher exposure levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 61, Issue 11, December 2005, Pages 1651-1664
نویسندگان
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