Triacylglycerol accumulation and change in fatty acid content of four marine oleaginous microalgae under nutrient limitation and at different culture ages

Journal of Basic Microbiology
Yangmin GongMulan Jiang

Abstract

Alteration of lipid biosynthesis is one of important biochemical changes when oleaginous microalgae grow under varied environmental conditions. The effects of culture age and nutrient limitation on triacylglycerol (TAG) accumulation and fatty acid content were investigated in four eicosapentaenoic acid (EPA)-rich marine microalgae. The amounts of TAGs in Chaetoceros sp., Phaeodactylum tricornutum and Nannochloropsis oculata increased sharply from day 4 to day 11, and then the former two remained nearly unchanged while the latter declined gradually during the batch culture. In contrast, no marked increase in TAG accumulation was observed in Pavlova viridis during the culture. Changes in total fatty acid (TFA) content mirrored those observed for TAG accumulation, while the EPA content reached a maximum generally at day 7 or 11 in the range of 11 - 32 mg g(-1) dry cell weight (DCW) and then declined. Nitrogen limitation led to a gradual increase in the amounts of TAGs from N. oculata pronouncedly but almost no change in other three species. The TFA content of the cultures after 5 days of nitrogen limitation was nearly twice that after 1 day in Chaetoceros sp., P. tricornutum and P. viridis, while the lowest increase (220 - 283 mg ...Continue Reading

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Citations

May 16, 2014·PloS One·Karen N PelletreauMary E Rumpho
May 11, 2016·Marine Environmental Research·G RomanoA Ianora
Jul 8, 2018·Journal of Animal Physiology and Animal Nutrition·Katharina Judith WildMarkus Rodehutscord
Jul 19, 2017·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Tore BrembuAtle M Bones
Aug 28, 2020·Biological Chemistry·Gianluca Dell'Aquila, Uwe G Maier
Dec 31, 2019·Environmental Science and Pollution Research International·Atreyee GhoshKiran Bala
Sep 9, 2016·The New Phytologist·José Pedro CañavateIsmael Hachero-Cruzado
Dec 8, 2020·Preparative Biochemistry & Biotechnology·Rıza Akgülİnci Tüney Kızılkaya
Dec 21, 2020·Journal of Bioscience and Bioengineering·Fatemeh-Rezaee AshtianiAbdeltif Amrane
Jul 3, 2021·Marine Drugs·Marisa SilvaPaz Otero

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