10 research outputs found
Study on the effect of salinity changes on growth, biomass, and chlorophyll a and carotenoid pigments of microalgae Nannochloropsis oculata
In this study the effect of different salinities on growth, biomass and pigments of Chlorophyll a and Carotenoid were tested to determine an appropriate salinity to produce maximum growth, biomass and carotenoids of microalgae (N.oculat).Therefore, the 2-liter flask contains microalga under different levels of salinities (20, 25, 32, 35, 50 ppt), and under laboratory conditions( temperature 25-22 ° C, PH. 8, and light period of 12 h light and 12 h darkness) were cultured for 14 days. The results of present study indicate that The maximum growth of microalgae (72.63Ă106 cell mlâ1) and the maximum specific growth rate of microalgae (0.33 dâ»1) included in treatments with salinity of 25 and 30 ppt, that had a significant difference with the other treatments (p<0.05). The maximum dry weight (0.022 g/lit) and amount of chlorophyll a (3.92 mg lit) was recorded in treatments with salinity of 30 ppt and shows significant difference with the other treatment (p<0.05). The Minimum amount of carotenoids (0.41 mg lit) was related to treatment with salinity of 50 ppt. shows a significant difference with other treatments (p<0.05). According to the results we can say that microalgae resistant to high salinity and a wide range of salinity has the ability to grow and produce carotenoids