The Effect of Different Light Spectra on Beta-Carotene Production by Dunaliella salina

This study focused on the effect of different light intensities and spectra on the beta-carotene production within Dunaliella salina cells (green eukaryote microalgae) which are purified from Urmia Lake in northwest Iran. For this purpose, four LED light spectra (white light: ۳۶۰–۷۶۰ nm, red light: ۶۲۰–۶۴۵ nm, yellow light: ۵۸۷–۵۹۵ nm, and blue light: ۴۶۰–۴۷۵ nm) were used in this experimental research. The light intensity of ۲۰۰ µmol/(m۲ s) was considered for each LED light spectra. The highest beta-carotene content extracted under a sequential combination of colored light (white, blue, red, and yellow respectively) was ۱۶.۹۳ µg of beta-carotene per mg of cell dry weight and the highest accumulated beta-carotene within the cells among single-colored light was ۱۵.۱۶ µg /mg when the cells were cultivated under yellow light.

کلیدواژه ها:

microalgae ، Dunaliella salina ، Beta-carotene ، Colored lights ، Salinity