Effect of different consentration of NaCl on growth, ammonium releasing,nitrate reductase activity and total protein contents in Dunaliella salina

In this experiment, we studied the effects of different NaCl solutions on (2.5%, 7.5% and 12.5% NaCl) proliferation, nitrate reductase activity, ammonium release, and protein content in the unicellular, biflagellate, halophilic micro algae, Dunaliella salina. Johnson medium with 2.5%, 7.5% and 12.5% NaCl were selected for treatment. Growth condition was maintained in all experiments (light, 5000 Lux, aeration 1hour daily, temperature 25±5◦C,). The microscopic results showed that in the salt solutionsDunaliella salina can proliferate and shows normal morphology and mobility. Based on results of this experiment, optimum proliferation occurred in 7.5% NaCl. Protein content didn’t show significant changes .