Journal
BIORESOURCE TECHNOLOGY
Volume 147, Issue -, Pages 23-28Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.08.022
Keywords
Antioxidative enzyme; Carotenoid; Dunaliella salina; Micronutrient limitation; Superoxide dismutase
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The aim of this study was to assess the effects of sixteen stress conditions on total carotenoid production and the response of antioxidative enzyme superoxide dismutase (SOD) in microalga Dunaliella saline. Of the stress conditions tested, high-light illumination (240 mu mol photons m(-2) s(-1)) in combination with nitrogen depletion were the conditions associated with maximum carotenoid production and which induced Fe-SOD and retained the specific Mn-SOD isoform. Removal of the micronutrients manganese (Mn), Zinc (Zn) and Iron (Fe) as well as nitrogen from the medium enhanced carotenoid production on day 5, while the removal of nitrogen and Mn from the growth medium drastically affected carotenoid production at all time-points. The differential response of SODs influences the levels of carotenoid biosynthesis as chronic molecular defence strategies of D. salina. (C) 2013 Elsevier Ltd. All rights reserved.
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