Enhancing lutein productivity of an indigenous microalga Scenedesmus obliquus FSP-3 using light-related strategies
Journal
Bioresource Technology
Journal Volume
152
Pages
275-282
Date Issued
2014
Author(s)
Abstract
Lutein, one of the main photosynthetic pigments, is a promising natural product with both nutritional and pharmaceutical applications. In this study, light-related strategies were applied to enhance the cell growth and lutein production of a lutein-rich microalga Scenedesmus obliquus FSP-3. The results demonstrate that using white LED resulted in better lutein production efficiency when compared to the other three monochromatic LEDs (red, blue, and green). The lutein productivity of S. obliquus FSP-3 was further improved by adjusting the type of light source and light intensity. The optimal lutein productivity of 4.08mg/L/d was obtained when using a TL5 fluorescent lamp at a light intensity of 300μmol/m2/s, and this performance is better than that reported in most related studies. Moreover, the time-course profile of lutein accumulation in the microalga shows that the maximal lutein content and productivity were obtained at the onset of nitrogen depletion. ? 2013 Elsevier Ltd.
Subjects
Light intensity
Light source
Lutein
Microalgae
Scenedesmus obliquus
Type
journal article