Abstract
The culture growth and carotenogenic activity of two Greek Dunaliella salina strains (AthU-Al D30 and AthU-Al D31) under stress conditions are investigated herein, with emphasis on β-carotene production as well as on lutein and zeaxanthin. In particular, the strains were cultivated in “standard” conditions (60 ‰ salinity and 1.18 M of NaNO3), under salinity stress conditions (160 ‰ salinity and 1.18 M of NaNO3) and under nitrogen deprivation conditions (60 ‰ salinity and 0 M of NaNO3). In addition to the two Greek strains, the D. salina CCAP 19/18 strain, which has been extensively studied regarding carotenogenesis, is included in this study as a reference. All three strains were found to produce increased amounts of β-carotene when cultivated under nitrogen deprivation conditions, while the AthU-Al D31 strain also produced high amounts of carotenoids under salt stress. The HPLC carotenoid profiles of the strains revealed reduced production of lutein in nitrogen deprivation conditions, coupled with a high production of β-carotene. The strains exhibited various responses in terms of carotenogenic activity, indicating an intraspecific variation in the metabolic reactions related to carotenogenesis.
Funder
Greece and the European Union
Subject
Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry
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