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


HAMED I., AK B., IŞIK O., USLU L.

TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES, vol.17, pp.1367-1372, 2017 (SCI-Expanded) identifier

Abstract

In this study Dunaliella sp. was isolated from the hypersaline Lake Tuz and its cell density, dry matter, chlorophyll a, and beta-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 degrees C, 22 degrees C, and 26 degrees C) with 3 different salinities (25 parts per thousand, 30 parts per thousand, and 35 parts per thousand) were tested over a 19-day study. Significant differences were found at the end of the cultivation period (P<0.05) for 18 degrees C and 26 degrees C. No statistically significance were reported for all tested salinity degrees (P>0.05). At the end of the experiment the maximum growth were noticed for 18 degrees C 25 parts per thousand in which the culture reached 3.48 105 cell/ml. The lowest was reported for 26 degrees C 35 parts per thousand (1.50 105 cell/ml). The culture of 18 degrees C 25 parts per thousand had also the best chlorophyll a concentration and biomass amount. For the beta-Carotene 22 degrees C 30 parts per thousand (4.39 10 -6 mol/l) had the highest accumulation. The optimum temperature for Dunaliella sp. growth was 18 degrees C at 25 parts per thousand.