Effect of Different Salinityon Growthand Carotenoid Content of Dunaliella sp. In Lamtoro Leaves Extract Media (Leucaena leucocephala)

Abstract

Dunaliella is a green microalgae that produces carotenoids, one of the carotenoid types
produced is β-carotene which accumulated in very high amounts in some stressful
conditions such as nitrogen limitations, high salinity and exposure high light intensity.
Leucaena leucocephala is one of the natural ingredients that  potential as a source of
nutrition of Dunaliella sp. growth. The aim of this study was to determine the effect of
different salinity in Lamtoro Leaves Extract Media on growth and carotenoid content
Dunaliella sp. The research was conducted in Aquaculture Laboratory, Agriculture
Faculty, Lampung University. The design of research was used completely randomized
design with 4 treatments and 3 repetitions. The treatments used was Lamtoro Leaves extract media with salinity  30 ppt, 35 ppt, 40 ppt, and 45 ppt. The result showed that
media of Lamtoro Leaves extract with different salinity gave significant effect on cell
density and carotenoid content of Dunaliella sp. (p<0,05). The results of this study
showed that the best cell growth occurred in the treatment of salinity 30 ppt with cell
density reached 5,09×10
6
cells/ml, while the highest carotenoid content was produced at
35 ppt salinity treatment of 1,0668 g/ml