Impact of copper on some physiological aspects of Nostoc muscorum with special references to the detoxifying role of calcium

Zaki, F. T. and Fathi, A. A. (2004) Impact of copper on some physiological aspects of Nostoc muscorum with special references to the detoxifying role of calcium. Acta Botanica Hungarica, 46 (3-4). pp. 423-433. ISSN 0236-6495

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Abstract

The cyanobacterium Nostoc muscorum was isolated from soil and exposed to different concentrations of copper. The data indicated that copper supplementation alone severely reduced dry weight, Chl-a, carotenoids and total protein of Nostoc muscorum. The drop was more prominent at higher concentrations. On the other hand, carbohydrate, proline content and metal accumulation in the algal cells were remarkably increased by supplementation of copper to the culture media. Copper was highly suppressive to the enzyme activities of Nostoc muscorum, more prominently at the higher concentrations. The applications of calcium concentrations of 40 or 80 mgl-1 alleviate the toxic effect of copper at the sublethal concentration.

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