The effect of iron Nanoparticles on the growth of Dunaliella Salina under laboratory condition

Today’s, Algae have many uses in the world. In many countries, algae constitute a major part of the economy and algae provide large quantities of the exports. The green micro-algae of Dunaliella and its various species are highly regarded by biotechnology researchers. In this study, the effects of iron nanoparticles solution (0.1 gr/lit concentration) on growth rate of Dunaliella salina evaluated in 3 treatments with different volumes of nanoparticles solution (0.75, 7.5 and 75ml). The cells density was monitored for 12 days and once in 2 days in different treatments and 3 replicates. Based on the results, the maximum cell growths (25.0× 105 cells/ml) were observed in in third treatment (75 ml of nanoparticles solution) and the minimum growth (10.8× 105 cells/ml) was in control treatment. The mean of cell density in second treatment (7.5 ml of nanoparticles solution) was not significantly different with control treatment in 6th and 8th days (p>0/05). However, there were significance difference in other days (P<0/05). The cell density showed significant difference (p<0/05) between first and third treatments (0.75 and 75 ml of nanoparticles solution) at level 95% for 12 days. Also growth rate and specific growth factor indicated that Dunaliella salina increased in third treatment and that other treatments had more growth than control treatment.