Uptake of zinc by cultured phytoplankters Hymenomonas elongata
- 1 January 1987
- journal article
- research article
- Published by Inter-Research Science Center in Diseases of Aquatic Organisms
- Vol. 3 (1) , 45-49
- https://doi.org/10.3354/dao003045
Abstract
Uptake of zinc by Hymenomonas elongata (Haptophyceae) was studied as a function of concentration in medium (from 25 to 600 .mu.g l-1) and of exposure time. Freundlich adsorption isotherms turned out to be a function of zinc concentration with saturation at values > 150 .mu.g Zn l-1. Zinc uptake at 150 .mu.g l-1 as a function of incubation time also followed saturation curves. In the dark, cells contaminated for 24 h and 48 h with zinc took up significantly less zinc than those placed in the light. Darkness or treatment of algae with DCMU, a powerful inhibitor of photosynthesis, strongly reduced zinc uptake. Cells killed by glutaraldehyde fixation took up significantly less zinc over 48 h than living cells. Zinc uptake by H. elongata is, thus, a light-dependent process, which seems to be linked to cell metabolism.Keywords
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