COMPARATIVE EVALUATION OF THE EFFECT OF STANNOUS CHLORIDE (SnCl2) AND DIMETHYLTIN DICHLORIDE (DMTC) ON DIAZOTROPHIC GROWTH AND NITROGEN METABOLISM OF NOSTOC MUSCORUMAbstract
Stannous chloride (SnCl2), an inorganic salt and Dimethyltin dichloride (DMTC), the organic species were found to influence the survival and nitrogen assimilatory system of Nostoc muscorum. A difference in the survival fractions suggested for differential susceptibility of the strain to the toxic effects of the either tin species. Growth of the Nostoc muscorum cells, measured as a function of graded concentration of SnCl2 and DMTC, both in the absence and presence of exogenous nitrogen sources, revealed an increased tolerance of Nostoc cells in the presence of nitrite (NaNO2), next to nitrogen-fixing condition. DMTC induced decline in the Nitrate Reductase (NR) and stimulation in the Glutamine synthetase (GS) activity indicated nitrogen starvation like condition. On the other hand, a vice versa result obtained with SnCl2 suggested for toxic effect of the inorganic nitrogen species.
J. Singh *, Shikha and D. P. Singh
Department of Environmental Science, Bareilly College, Bareilly, Uttar Pradesh, India
05 March, 2016
16 May, 2017
18 May, 2017
01 June, 2017