The Effects of Salinity and Temperature on the Growth of Dunaliella sp. Isolated from the Salt Lake (Tuz G?lü), Turkey

摘要

In this study Dunaliella sp. was isolated from the hypersaline Lake Tuz and its cell density, dry matter, chlorophyll a, and β-carotene production were studied in a batch system. The aim of this research was to determine the optimal conditions for Dunaliella sp. growth. Therefore 3 different temperatures (18°C, 22°C, and 26°C) with 3 different salinities (25‰, 30‰, and 35‰) were tested over a 19-day study. Significant differences were found at the end of the cultivation period (P 0.05). At the end of the experiment the maximum growth were noticed for 18°C 25‰ in which the culture reached 3.48 105 cell/ml. The lowest was reported for 26°C 35‰ (1.50 105 cell/ml). The culture of 18°C 25‰ had also the best chlorophyll a concentration and biomass amount. For the β-Carotene 22°C 30‰ (4.39 10 -6 mol/l) had the highest accumulation. The optimum temperature for Dunaliella sp. growth was 18°C at 25‰