Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc
Some biological responses of the marine diatom Nitzschia closterium to copper and zinc were studied. The species was isolated from the Gulf of Suez and grown in liquid culture with enriched filtered seawater over a maximum period of 10 days. The results indicated that low concentrations of copper (1 and 5 μg.l-1) and zinc (10, 20 and 50 μg.l-1) stimulated the growth, photosynthetic pigments (chlorophyll-a,c and carotenoids), total soluble proteins as well as 02-evolution in photosynthesis and dark respiration (02uptake) of the diatom as compared with the control culture. Whereas, higher concentrations of 50, 100, 200 and 300 μg.l-1 copper and 100, 200, 300, 400 and 600 μg.l-1 zinc inhibited the above metabolic processes of the organism (taking into consideration that the culture treated with 10 μg.l-1 zinc produced the same O2-uptake as in the control culture). Statistically, there exists reverse correlation between the different concentrations of copper and zinc and the metabolic processes of Nitzschia closterium as proved with linear regression equations.
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Format: | article biblioteca |
Language: | English |
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2008
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Subjects: | Biology, Anacystis, Chlorella, Gulf of Suez, Nitzschia, |
Online Access: | http://hdl.handle.net/1834/40715 |
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dig-aquadocs-1834-407152021-07-24T02:40:59Z Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc El-Sherif, Zeinab M. El-Naggar, Amal H. Osman, Mohamed E.H. Nassar, Mohamed Z. Biology Anacystis Chlorella Gulf of Suez Nitzschia Some biological responses of the marine diatom Nitzschia closterium to copper and zinc were studied. The species was isolated from the Gulf of Suez and grown in liquid culture with enriched filtered seawater over a maximum period of 10 days. The results indicated that low concentrations of copper (1 and 5 μg.l-1) and zinc (10, 20 and 50 μg.l-1) stimulated the growth, photosynthetic pigments (chlorophyll-a,c and carotenoids), total soluble proteins as well as 02-evolution in photosynthesis and dark respiration (02uptake) of the diatom as compared with the control culture. Whereas, higher concentrations of 50, 100, 200 and 300 μg.l-1 copper and 100, 200, 300, 400 and 600 μg.l-1 zinc inhibited the above metabolic processes of the organism (taking into consideration that the culture treated with 10 μg.l-1 zinc produced the same O2-uptake as in the control culture). Statistically, there exists reverse correlation between the different concentrations of copper and zinc and the metabolic processes of Nitzschia closterium as proved with linear regression equations. Higher Education Commission of Pakistan 2021-06-24T18:38:41Z 2021-06-24T18:38:41Z 2008 article TRUE 1019-8415 http://hdl.handle.net/1834/40715 en http://pakjms.com application/pdf application/pdf 35-47 pjms_ku@yahoo.com http://aquaticcommons.org/id/eprint/26510 25017 2019-05-19 12:02:26 26510 University of Karachi. Marine Reference Collection and Resource Centre |
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Biology Anacystis Chlorella Gulf of Suez Nitzschia Biology Anacystis Chlorella Gulf of Suez Nitzschia |
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Biology Anacystis Chlorella Gulf of Suez Nitzschia Biology Anacystis Chlorella Gulf of Suez Nitzschia El-Sherif, Zeinab M. El-Naggar, Amal H. Osman, Mohamed E.H. Nassar, Mohamed Z. Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc |
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Some biological responses of the marine diatom Nitzschia closterium to copper and zinc were studied. The species was isolated from the Gulf of Suez and grown in liquid culture with enriched filtered seawater over a maximum period of 10 days. The results indicated that low concentrations of copper (1 and 5 μg.l-1) and zinc (10, 20 and 50 μg.l-1) stimulated the growth, photosynthetic pigments (chlorophyll-a,c and carotenoids), total soluble proteins as well as 02-evolution in photosynthesis and dark respiration (02uptake) of the diatom as compared with the control culture. Whereas, higher concentrations of 50, 100, 200 and 300 μg.l-1 copper and 100, 200, 300, 400 and 600 μg.l-1 zinc inhibited the above metabolic processes of the organism (taking into consideration that the culture treated with 10 μg.l-1 zinc produced the same O2-uptake as in the control culture). Statistically, there exists reverse correlation between the different concentrations of copper and zinc and the metabolic processes of Nitzschia closterium as proved with linear regression equations. |
format |
article |
topic_facet |
Biology Anacystis Chlorella Gulf of Suez Nitzschia |
author |
El-Sherif, Zeinab M. El-Naggar, Amal H. Osman, Mohamed E.H. Nassar, Mohamed Z. |
author_facet |
El-Sherif, Zeinab M. El-Naggar, Amal H. Osman, Mohamed E.H. Nassar, Mohamed Z. |
author_sort |
El-Sherif, Zeinab M. |
title |
Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc |
title_short |
Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc |
title_full |
Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc |
title_fullStr |
Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc |
title_full_unstemmed |
Some biological responses of the diatom Nitzschia closterium (W. Smith) to copper and zinc |
title_sort |
some biological responses of the diatom nitzschia closterium (w. smith) to copper and zinc |
publishDate |
2008 |
url |
http://hdl.handle.net/1834/40715 |
work_keys_str_mv |
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1756080065164083200 |