Document Type : biological oceanography


1 Islamic Azad University, Sciences and Research Branch, Tehran, Iran

2 Research Center of Inland Aquaculture, Bandar-e-Anzali, Iran

3 Iran Fisheries Research Organization, P.O.Box: 14155-6116, Tehran, Iran


In this study, effects of pH and salinity on growth and bloom of Dunaliella sp. algae were investigated. The algae were reared in different pH (6.0, 6.8, 7.0, 7.3, 7.6, 8.0, 8.6, 9.0, 9.7 and 11.0) and salinities (20.0, 31.6, 50.1, 79.4, 117.1, 125.9 and 200.0 ppt) at Inland Aquaculture Research Institute Phycolab during 2011. After 96 h, the algae reared in 50ppt salinity and below that had negative growth, however, beyond the 50 ppt, it started to grow and reached the growth peak in 117.1 ppt. In 125 and 200 ppt, the algae growth decreased compared to 117.1 ppt. Exceptsalinityof31.62and50.11descendant of the other groups was significant (P < 0.05). At the different pH, after 96 h the lowest growth was observed in pH 11, whereas, the highest growth was in pH 7.6 while increasing pH above 9.0 led to negative growth. These differences were significant (P <0.05).


Abusara, N. F.; Emeish, S., (2011). The Effect of certain environmental factors on growth and β-carotene production by Dunaliellasp. Isolated from the Dead Sea. Jordan J. of Bio. Sci., 4, 29-36.
Aksoy, F.; Koru, E., (2012). Physiological characterization of Dunaliellasp. (Chlorophyta, Volvacales) From Camalti salt work (izmir-turkey). International Symposium on Sustainable Development.
Ben-amotz, A., (1991).The biotechnology of cultivating Dunaliella for production of β-carotene rich algae.Bioresource Tech., 38(2-3), 233-235.
Boney, L., (1989). Phytpplankton. Edwardannoid. British library cataloguing Publication data, 198.
Davies, F., (1998). Inhibition of marine photosynthesis by ultraviolet radiatin: variablesensivity of phytoplankton in Waddell-Scotia Confluence during the austral spring. Limno. oceangr., 43(3), 433-448.
Dolapskis, P., (2011). Lipid synthesized by micro-algae grown in laboratory- and industrial- scale bioreactors. Eng. Life Sci., 11(1), 52-58.
Harris, G., (1986). Phytoplankton ecology, structure, function and fluctuation London NEW York. Ecological studies of phytoplankton in Tai Tam Bay. Hong Kong. Hydrobiologia, 247, 77-89.
Hui, C.; Yong-Min, L., (2011).Effect of salinitieson the gene expression of a (NAD+)-dependent glycerol-3-phosphate dehydrogenize in Dunaliellasalina. Sci Total Environ., 409(7), 1291-1297.
Jimenez, C., Niell, X., (1991) .Growth of Dunaliellaviridis Teodoresco: Effect of salinity, temperature and nitrogen concentration. J ApplPhycol, 3(4), 319-327.
King, L., (2002). Seasonsl variation in the epilithic algal communities from four Lakes of different trophic states. Arich. Hydrobiol., 154, 177-198.
Leach, G.; Oliveira, G., (1998). Spray drying of Dunaliellasalina to produce rich powder. J.Indus.Micro.Biotech., 20, 82-85.
Naz, M.; Turkman, M., (2005). Phytoplankton Biomass and Species Composition of lake. Turk. J. Biol., 29, 49-56.
Onyema, I., (2008).A Checklist of phytoplankton species of the Iyagbe Lagoon. Lagos. J. Fish Aqua. Sci., 3(3), 167-175.
Oren, A., (2005). A hundred years of Dunaliellaresearch: 1905-2005. Biomed Central, 1: 2, 1-14.
Ortega, A., (2003). Vertical structure of the phytoplankton community associated with a coastal plume in the Gulf of Mexico. Mar. Ecol. Prog. Ser., 251, 87-101.
Piri, Z. M.; Ordog, V., (1997). Effect of some herbicides commonly used in Iranian agriculture on aquatic food chain. Ph. D. thesis to Hngarian Academy of Science, 19-30.
Rad, F-A.; Aksoz, N., (2011).Effect of salinity on the cell growth and beta-carotene production in Dunaliellasp. Isolates from Urmia Lake in northwest of Iran.Afr. J.Biotechnol., 10, 2282-2289.
Shariati, M.; Madakarhaghji, M., (2007). Photosynthesis and Respiration under Low Temperature Stress in Two Dunaliella Strain. WASJ., 2(4), 276-282.
Tawfiq, S.; Suad, A., (2010). Optimum culture conditions required for the locally isolated Dunaliellasalina. J. Algal Biomass Utln., 1(2), 12-19.