effect of immobilization technique and salinity stress on growth, carotenoid and carbohydrat production in Dunaliella salina microalgae

Haidarizadeh, Masoud; Olfaty, Negar; Sadeghi, Sayed Fasih

doi:10.22124/japb.2024.25973.1520

effect of immobilization technique and salinity stress on growth, carotenoid and carbohydrat production in Dunaliella salina microalgae

Document Type : Research Paper

Authors

¹ Department of Biological Science, Faculty of Science, University of Kurdistan, Sanandaj

² , Department of Biological Science, Faculty of Science, University of Kurdistan, Sanandaj, Iran

³ Department of Biological Science, Faculty of Science, University of Kurdistan, Sanandaj, Iran

10.22124/japb.2024.25973.1520

Abstract

Microalgae are used to produce valeable natural compounds. Low yield and high cost limit the commercial potential of microalgae. Recently, the techniques of immobilization and increasing production efficiency have been noticed. In the present study, the effect of salt concentration, stabilization and growth period on growth, biomass, carbohydrate, carotenoid, chlorophyll a and b in Dunaliella salina was evaluated. The results showed that the growth of microalgae in free conditions is more than in stabilization conditions. At salinity of 150 and 300 g/L, algae growth is significantly reduced. The maximum biomass was measured at 75 g/L salinity and free conditions. Carotenoid in salinity of 75 g/L and unsterilized conditions is more than other treatments. Carbohydrate in salinity of 30 g/l is significantly higher than other treatments. In the concentration of 150 g/L of carbohydrates, it is significantly higher in stabilization conditions. It seems that the composition of the substrate as well as the method of application of stabilization is an effective factor. Salt stress is a simple method to induce carotenoid synthesis. Research in the field of optimization of the material used as well as the method of applying stabilization to increase the production efficiency of valuable compounds seems necessary.

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