Total lipid production of the green alga Nannochloropsis sp. QII under different nitrogen regimes

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · J. Phycol.; (United States)

DOI:https://doi.org/10.1111/j.1529-8817.1987.tb04137.x· OSTI ID:5900492

Suen, Yu; Hubbard, J S; Holzer, G; Tornabene, T G

The green alga Nannochloropsis sp. QII was cultivated in media with sufficient and growth-limiting levels of nitrogen (nitrate). Nitrogen deficiency promoted lipid synthesis yielding cells with lipids comprising 55% of the biomass. The major lipids were triacylglycerols (79%), polar lipids (9%) and hydrocarbons (2.5%). The polar lipids consisted of a broad range of phospholipids, glycolipids and sulfolipids. Other lipids identified were pigments, free fatty acids, saponifiable and unsaponifiable sterol derivatives, various glycerides, a family of alkyl-1, 4-dioxane derivatives and a series of alkyl- and hydroxy-alkyl-dimethyl-acetals. Experiments in which /sup 14/CO/sub 2/ was provided at different times in the growth cycle demonstrated that enhanced lipid biosynthesis at low nitrogen levels resulted principally from de novo CO/sub 2/ fixation.

• Research Organization: Georgia Institute of Technology, Atlanta
• OSTI ID: 5900492
• Journal Information: J. Phycol.; (United States), Journal Name: J. Phycol.; (United States) Vol. 23:2; ISSN JPYLA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
551001* -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ALGAE
BIOLOGICAL STRESS
BIOSYNTHESIS
CARBON 14 COMPOUNDS
CARBON DIOXIDE FIXATION
ELEMENTS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LIPIDS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
PLANTS
SYNTHESIS
TRACER TECHNIQUES