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- Title
Toxicological response of a cyanobacterium Phormidium fragile, to mercury
- Authors
Khalil, Z.
- Abstract
The effects of different concentrations of on the cyanobacterium Phormidium fragile were studied. The results revealed that the dry biomass yield, protein content, chlorophyll a and carotenoids decreased with increased concentration of mercury from 0.01 to 1.5 mg L -1 Also, malate dehydrogenase (MDH), glutamate dehydrogenase (GIDH)and nitrate reductase activity was suppressed by increased metal concentration whereas glutamic-oxalacetic transaminase (GOT) and glutamic-pyruvic transaminase (GPT) were hardly affected. Mercury uptake increased at the higher levels of the metal. On the other hand, all the amino acid components gradually increased with rise of the metal level except isoleucine, histidine and methionine which were suppressed by the smaller doses and completely disappeared by the larger doses ofthe metal.
- Subjects
TOXICOLOGY; CYANOBACTERIA
- Publication
Water, Air & Soil Pollution, 1997, Vol 98, Issue 1-2, p179
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/BF02128656