UV-C mediated rapidcarotenoid induction and settling performance of Dunaliellasalina and Haematococcus pluvialis

作者：Sharma Kalpesh K; Ahmed Faruq; Schenk Peer M; Li Yan^*

来源：Biotechnology and Bioengineering, 2015, 112(10): 2106-2114.

DOI：10.1002/bit.25621

• UV-C radiation
• carotenoid induction
• fatty acids
• cell settlement

Microalgae are primary producers of organic pigments carotenoids in aquatic environments. However, commercial-scale microalgae application for high value carotenoids production is rarely economical due to the cost-effectiveness of carotenoid induction and microalgal harvesting process. Here, we present a novel approach, using a small dose of externally applied UV-C radiation, to rapidly induce unsaturated fatty acids and carotenoid biosynthesis in Dunaliella salina and Haematococcus pluvialis, and also to significantly promote their swimming cells settling for primary dewatering. The amount of total carotenoids and -carotenoid were doubled in 24h on D. salina upon 50mJ/cm(2) of UV-C radiation, whereas the astaxanthin yield of H. pluvialis was increased five times in 48h at 30mJ/cm(2). Meanwhile, 95% of algal cells of D. salina and H. pluvialis settled in 15h and 2h, respectively. This novel technique represents a convenient, time-saving and cost-effective method for commercial microalgal carotenoids production. Biotechnol. Bioeng. 2015;112: 2106-2114.

• 出版日期2015-10