Abstract
The main industrial application s of heavy metals in leather and textile manufacturing, electro painting, corrosion inhibitio n, plating, glassware - cleaning solutions and the production of pigments has increase d concentration of hexavalent chromium in the environment that lead to a serious problem to the ecosystem. Since, h exavalent chromium is found to be toxic in human beings. The present study has been designed to determine hexavalent chromium induced bio molecular changes in Spirulina platensis . Spirulina platensis, a filamentous cyanobacterium known as blue green algae of aquatic ecosystem has high economic importance due to i ts therapeutic potential. Blue green algae , Spirulina platensis was exposed to different concentration (0.01, 0.1, 1, 5, and 10 mg/l) of hexavalent chromium as potassium chromate and observed for different growth parameters for 9 days of incubation period. The concentration variation of carbohydrate, protein and chlorophyll - a pigment in Spirulina platensis was observed in the presence of chromium. T he growth of Spirulina platensis was inhibited upon exposure of different concentrations of chromium. Maximum growth inhibition was observed in 10 mg/l of chromium treated cells as compared to control. The extent of toxicity increased wi th increasing concentration of c hromium along with exposure time.
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