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Toxicity of nickel and silver to Nostoc muscorum: interaction with ascorbic acid, glutathione, and sulfur-containing amino acids

Journal Article · · Ecotoxicol. Environ. Saf.; (United States)
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Exposure of Nostoc muscorum to different concentrations of Ni and Ag brought about reduction in growth, carbon fixation, heterocyst production, and nitrogenase activity and increase in the loss of ions (K+, Na+). In an attempt to ameliorate the toxicity of test metals by ascorbic acid, glutathione, and sulfur-containing amino acids (L-cysteine and L-methionine), it was found that the level of protection by ascorbic acid and glutathione was more for Ag than Ni. However, metal-induced inhibition of growth and carbon fixation was equally ameliorated by methionine. But the level of protection by cysteine was quite different, i.e., 27% for Ni and 22% for Ag. Protection of metal toxicity in N. muscorum by amino acids lends further support to self-detoxifying ability of cyanobacteria because they are known to synthesize all essential amino acids.

Research Organization:
Banaras Hindu Univ., Varanasi (India)
OSTI ID:
5295264
Journal Information:
Ecotoxicol. Environ. Saf.; (United States), Journal Name: Ecotoxicol. Environ. Saf.; (United States) Vol. 14:1; ISSN EESAD
Country of Publication:
United States
Language:
English

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Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AMINO ACIDS
ASCORBIC ACID
BIOLOGICAL EFFECTS
CARBON DIOXIDE FIXATION
CARBOXYLIC ACIDS
CYANOBACTERIA
CYSTEINE
DRUGS
ELEMENTS
ENZYMES
GLUTATHIONE
GROWTH
INHIBITION
LIPOTROPIC FACTORS
METALS
METHIONINE
MICROORGANISMS
NICKEL
NITRO-GROUP DEHYDROGENASES
NITROGENASE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDOREDUCTASES
PEPTIDES
POLLUTION
POLYPEPTIDES
PROTEINS
RADIOPROTECTIVE SUBSTANCES
RESPONSE MODIFYING FACTORS
SILVER
THIOLS
TOXICITY
TRANSITION ELEMENTS
VITAMINS
WATER POLLUTION