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

Sharma, Kalpesh K., Ahmed, Faruq, Schenk, Peer M., and Li, Yan (2015) UV-C mediated rapidcarotenoid induction and settling performance of Dunaliellasalina and Haematococcus pluvialis. Biotechnology and Bioengineering, 112 (10). pp. 2106-2114.

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Abstract

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 β-carotenoid were doubled in 24 h on D. salina upon 50 mJ/cm2 of UV-C radiation, whereas the astaxanthin yield of H. pluvialis was increased five times in 48 h at 30 mJ/cm2. Meanwhile, 95% of algal cells of D. salina and H. pluvialis settled in 15 h and 2 h, respectively. This novel technique represents a convenient, time-saving and cost-effective method for commercial microalgal carotenoids production.

Item ID: 41810
Item Type: Article (Research - C1)
ISSN: 1097-0290
Keywords: UV-C radiation, carotenoid induction, fatty acids, cell settlement
Funders: Australian Research Council (ARC), James Cook University (JCU), The University of Queensland
Projects and Grants: JCU20732
Date Deposited: 08 Dec 2015 17:59
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8299 Other Plant Production and Plant Primary Products > 829999 Plant Production and Plant Primary Products not elsewhere classified @ 100%
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