NDLI: Simultaneous Cd2+, Zn2+, and Pb2+ Uptake and Accumulation by Photosynthetic Euglena gracilis

Content Provider	Springer Nature Link
Author	Mendoza Cózatl, D. G. Rangel González, E. More Sánchez, R.
Copyright Year	2006
Abstract	The ability of Euglena gracilis to simultaneously remove and accumulate Zn2+, Cd2+, and Pb2+ from culture up- to media was evaluated. E. gracilis was able to remove up to 80% of the Cd2+ present in the medium when cultured with 20 or 50 μM CdCl2. Higher external Cd2+ concentrations increased Cd2+ accumulation per cell but decreased cell growth, thus decreasing the capacity of the cell culture to remove Cd2+. E. gracilis removed 70% to 80% of the Zn2+ present in the medium when cultured with 5 to 50 μM ZnSO4. Zn2+ did not affect Cd2+ removal capacity. E. gracilis was much less efficient in removing Pb2+ (<15%) when cultured with 100 or 200 μM Pb(NO3)2. Moreover, Pb2+ decreased the efficiency to remove Cd2+, but it did not affect Zn2+ removal. Cd2+ induced a generalized increase in the cellular thiol compounds, including phytochelatins, and Pb2+ had an additive effect only at 200 μM. Zn2+ did not stimulate phytochelatin synthesis. Cd2+ and Pb2+ colocated in the same cytosolic high-molecular-weight fraction. Because Pb2+ is a weak phytochelatin inducer, competition between Pb2+ and Cd2+ for transportation across the plasma membrane and binding to phytochelatins and other thiol compounds is proposed to explain the detrimental effects of Pb2+ on the Cd2+ removal capacity of E. gracilis.
Starting Page	521
Ending Page	528
Page Count	8
File Format	PDF
ISSN	00904341
Journal	Archives of Environmental Contamination and Toxicology
Volume Number	51
Issue Number	4
e-ISSN	14320703
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-09-23
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Agriculture Ecology Forestry Environment Soil Science & Conservation Terrestrial Pollution
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Medicine Toxicology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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