|
KMID : 0545120180280122019
|
|
Journal of Microbiology and Biotechnology
2018 Volume.28 No. 12 p.2019 ~ p.2028
|
|
|
Enhancing astaxanthin accumulation in Haematococcus pluvialis by coupled light intensity and nitrogen starvation in column photobioreactors
|
|
Zhang Wen-Wen
Zhou Xue-Fei
Zhang Ya-Lei
Cheng Peng-Fei
Ma Rui
Cheng Wen-Long
Chu Hua-Qiang
|
|
|
Abstract
|
|
|
|
The natural astaxanthin mainly derives from the microalgae producer, Haematococcus pluvialis. The induction of nitrogen starvation and high light intensity is particularly significant for boosting astaxanthin production. However, the different responses of light intensity and nitrogen starvation should be analyzed for biomass growth and astaxanthin accumulation. The results showed that the highest level of astaxanthin was achieved in nitrogen starvation, which was 1.64 times higher than the control group at 11 days. With regard to the optimization for light intensity utilization, it was at 200 μmo/m2/s under nitrogen starvation that the highest astaxanthin productivity per light intensity was achieved. In addition, both high light intensity and nitrogen source had significant effects on multiple indicators. Furthermore, high light intensity had a greater significant effect than nitrogen source on biomass dry weight, astaxanthin yield and astaxanthin productivity; in contrast, nitrogen starvation was more beneficial for enhancing astaxanthin content per dry weight biomass. The data indicates that high light intensity synergizes with nitrogen starvation to stimulate the biosynthesis of astaxanthin.
|
|
|
KEYWORD
|
|
|
Haematococcus pluvialis, biomass growth, astaxanthin production, high light intensities, nitrogen starvation
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|