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Heavy-metal toxicity in the cyanobacterium Nostoc Linckia |
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| Authors: | D Kumar M Jha HD Kumar |
| Institution: | Laboratory of Algal Biology, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi-221 005 India |
| Abstract: | The effects of HgCl2, NiCl2 and CoCl2 on Nostoc linckia (Roth) Born. et Flah. were studied. Low level (0.2 p.p.m.) of mercury increased heterocyst frequency, stimulated nitrate reductase and ammonium uptake, but significantly inhibited acetylene-reducing and glutamine-synthetase activities. In contrast, NiCl2 and CoCl2 greatly inhibited all of the above processes. |
| Keywords: | Present address and address for correspondence: The University of Texas at Austin Marine Science Institute Port Aransas TX-78373 U S A |
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