Turkish Journal of Fisheries and Aquatic Sciences
2019, Vol 19, Num, 4 (Pages: 331-342)
Ammonium Nutrition Induces Triacylglycerol, β-carotene, and Lutein Production in Dunaliella tertiolecta Butcher
Zeynep Elibol Cakmak 1
1 İstanbul Medeniyet University, Department of Bioengineering, Faculty of Engineering and Natural Sciences, 34730, İstanbul, Turkey
DOI :
10.4194/1303-2712-v19_4_07
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Distinct impacts of ammonium nutrition for simultaneous production of
triacylglycerol, lutein, and β-carotene were evaluated in Dunaliella tertiolecta. A
physiologically realistic growth system was employed to compare metabolite
production and growth characteristics of nitrogen deprived, ammonium- and nitrate
supplied D. tertiolecta. The nitrogen dependent changes in D. tertiolecta were
reflected as a dramatic decrease in growth related to decreased photosynthetic
activity, reduced pigmentation and increased triacylglycerol production as observed
in nitrogen deprived microalgae. On the other hand, ammonium nutrition caused a
time-dependent increase of neutral lipids, triacylglycerols, chlorophylls and
carotenoids, lutein and β -carotene in particular. Finally, ammonium nutrition
improved FAME profile of D. tertiolecta for biodiesel production via an exclusive
impact on increased saturation.
Keywords :
Ammonium, Dunaliella tertiolecta, Lutein, Triacylglycerol, β-carotene