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Accumulation and subcellular ditsribution of Cd in the Antarctic bivalve Laternula elliptica

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Title
Accumulation and subcellular ditsribution of Cd in the Antarctic bivalve Laternula elliptica
Other Titles
남극 큰띠조개 에서의 기관별 카드뮴 농축 양상
Authors
Choi, Heeseon J.
Lee, Yong-Seok
JEONG, KYE HEON
Ahn, In-Young
Keywords
Antarctic; Laternula elliptica; cadmium; metal accumulation; metallothioneins
Issue Date
2004
Citation
Choi, Heeseon J., et al. 2004. Accumulation and subcellular ditsribution of Cd in the Antarctic bivalve Laternula elliptica. City University of Hong Kong. City University of Hong Kong. 2004.06.01~.
Abstract
Accumulation and subcellular partitioning of Cd in the gills, digestive gland, and kidney of the Antarctic bivalve Laternula ellipitca were determined following a 14-day exposure to 50 µgCd·l-1. Cd concentration in the gills increased rapidly reaching up to 20 times of the control levels after 14 days of exposure. Significant increase of Cd was also observed in the digestive gland and kidney. Both the soluble and insoluble particulate fractions of the tissues were involved in Cd accumulation, however, their relative contributions to Cd sequestration varied with the organ and the total amount of Cd accumulated. In the gills and kidney, insoluble particulate fraction was the major Cd sequestering component and the proportion of Cd associated with this fraction increased with the total Cd concentration. In the digestive gland, Cd was accumulated to the soluble and insoluble fractions in similar proportions. Whether it is proportionately large or small, Cd in the soluble fractions was mainly associated with metallothionein-like Cd-binding protein in all the three organs, although the amount of Cd associated with smaller molecular weight peptides increased with exposure time. Strong immune response to an MT antibody confirmed the presence of MT in all three organs. Increase of the amount of Cd bound to MT-like protein was observed with increasing exposure time.
URI
http://repository.kopri.re.kr/handle/201206/8543
Conference Name
City University of Hong Kong
Conference Place
City University of Hong Kong
Conference Date
2004.06.01~
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