Nickel effects on phosphate uptake, alkaline phosphatase, and ATPase of a cyanobacterium

Experiments on the effects of sub-lethal concentrations of nickel on the cyanobacterium Nostoc muscorum showed that the metal significantly inhibited photo-autotrophic growth at a concentration of 15 um. Nickel also inhibited uptake of phosphate by the cells, the degree of inhibition being dependent...

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Veröffentlicht in:	Bulletin of environmental contamination and toxicology 1992-01, Vol.48 (1), p.45-54
Hauptverfasser:	Asthana, R.K. (Banaras Hindu University, Varanasi, India), Singh, S.P, Singh, R.K
Format:	Artikel
Sprache:	eng
Schlagworte:	560300 - Chemicals Metabolism & Toxicology ABSORCION DE SUBSTANCIAS NUTRITIVAS ABSORPTION DE SUBSTANCES NUTRITIVES ACID ANHYDRASES Action of physical and chemical agents on bacteria ACTIVIDAD ENZIMATICA ACTIVITE ENZYMATIQUE Adenosine Triphosphatases - antagonists & inhibitors ADENOSINETRIPHOSPHATASE ALKALINE PHOSPHATASE Alkaline Phosphatase - antagonists & inhibitors ATP-ASE Bacteriology Biological and medical sciences BIOLOGICAL EFFECTS Ca(2+) Mg(2+)-ATPase - metabolism Calcium-Transporting ATPases - metabolism CRECIMIENTO CROISSANCE CYANOBACTERIA Cyanobacteria - enzymology Cyanobacteria - growth & development Cyanobacteria - metabolism ENZYME ACTIVITY ENZYMES ENZYMIC ACTIVITY ESTERASES FOSFATASA ALCALINA FOSFATOS Freshwater Fundamental and applied biological sciences. Psychology GROWTH HIDROLASAS HYDROLASE HYDROLASES Kinetics Microbiology MICROORGANISMS NICKEL Nickel - pharmacology NICKEL COMPOUNDS NIQUEL NOSTOC NOSTOC MUSCORUM NUTRIENT UPTAKE ORGANIC COMPOUNDS PHOSPHATASE ALCALINE PHOSPHATASES PHOSPHATE PHOSPHATES Phosphates - metabolism PHOSPHOHYDROLASES POLLUTION PROTEINS RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT TRANSITION ELEMENT COMPOUNDS WATER POLLUTION
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Beschreibung
Zusammenfassung:	Experiments on the effects of sub-lethal concentrations of nickel on the cyanobacterium Nostoc muscorum showed that the metal significantly inhibited photo-autotrophic growth at a concentration of 15 um. Nickel also inhibited uptake of phosphate by the cells, the degree of inhibition being dependent on metal concentration; there was evidence of a non-competitive type of interaction between nickel and phosphate. At all but the lowest concentration tested (1 um), nickel inhibited the activity of the alkaline phosphatase enzyme, but stimulated the activities of both magnesium-dependent and calcium-dependent ATPases.
ISSN:	0007-4861 1432-0800
DOI:	10.1007/BF00197482