Provided is a method of culturing one or more microorganisms. The method includes culturing one or more microorganisms in a medium comprising crude glycerol at a first concentration level, feeding to the media an additional amount of crude glycerol, once the first concentration of glycerol is reduced to a first threshold level, at a concentration sufficient to achieve the first concentration level, monitoring the crude glycerol concentration until the first concentration level of the crude glycerol is reduced to the first threshold level. The steps may be repeated until a desired microorganism cell density is achieved.

Provided is a method of culturing one or more microorganisms. The method includes culturing one or more microorganisms in a medium comprising crude glycerol at a first concentration level, feeding to the media an additional amount of crude glycerol, once the first concentration of glycerol is reduced to a first threshold level, at a concentration sufficient to achieve the first concentration level, monitoring the crude glycerol concentration until the first concentration level of the crude glycerol is reduced to the first threshold level. The steps may be repeated until a desired microorganism cell density is achieved.

The present invention relates generally to the field of recombinant fatty acid synthesis, particularly in transgenic plants. The application describes genes involved in fatty acid synthesis and provides methods and vectors for the manipulation of fatty acid composition of plant oils. In particular, the invention provides constructs for achieving the integration of multiple heterologous genes involved in fatty acid synthesis into the plant genome, such that the resulting plants produce altered levels of polyunsaturated fatty acids. Also described are methods for enhancing the expression of fatty acid biosynthesis enzymes by co-expressing a silencing suppressor within the plant storage organ.

The present invention relates to a process for enriching a biomass of microalgae of the Thraustochytrium genus with DHA and with arginine and glutamic acid amino acids, characterized in that it comprises a step aimed at limiting the rate of growth of the microalga while at the same time maintaining or continuously introducing a source of nitrogen in or into the fermentation medium.

The present invention relates to methods of synthesizing long-chain polyunsaturated fatty acids, especially eicosapentaenoic acid, docosapentaenoic acid and docosahexaenoic acid, in recombinant cells such as yeast or plant cells. Also provided are recombinant cells or plants which produce long-chain polyunsaturated fatty acids. Furthermore, the present invention relates to a group of new enzymes which possess desaturase or elongase activity that can be used in methods of synthesizing long-chain polyunsaturated fatty acids. In particular, the present invention provides ω3 destaurases, Δ5 elongases and Δ6 desaturases with novel activities. Also provided are methods and DNA constructs for transiently and/or stably transforming cells, particularly plant cells, with multiple genes.

Microalgal mutant to produce high-value essential LCPUFA oils including eicosadienoic acid (EDA), dihomo-γ-linoleic acid (DGLA), arachidonic acid (ARA), and eicosapentaenoic acid (EPA) in various ratios in are provided.

A method for producing a polyunsaturated fatty acid (PUFA) or a lipid containing a PUFA, a microbial cell containing a PUFA, and use of the microbial cell are provided. A method for producing a polyunsaturated fatty acid (PUFA) or a lipid containing a PUFA including culture of a microorganism capable of producing arachidonic acid (ARA) and/or dihomo-gamma-linolenic acid (DGLA) is provided, the method including at least one of the following steps: (a) adding an organic acid in an amount of 0.01 to 5 w/v % to a culture medium after the beginning of main culture; (b) increasing the pH of the culture medium to a range effective for culture after the beginning of the main culture; and (c) adding a metal sulfate in an amount of 0.01 to 0.5 w/w % to the main culture medium.

A method for producing a polyunsaturated fatty acid (PUFA) or a lipid containing a PUFA, a microbial cell containing a PUFA, and use of the microbial cell are provided. A method for producing a polyunsaturated fatty acid (PUFA) or a lipid containing a PUFA including culture of a microorganism capable of producing arachidonic acid (ARA) and/or dihomo-gamma-linolenic acid (DGLA) is provided, the method including at least one of the following steps: (a) adding an organic acid in an amount of 0.01 to 5 w/v % to a culture medium after the beginning of main culture; (b) increasing the pH of the culture medium to a range effective for culture after the beginning of the main culture; and (c) adding a metal sulfate in an amount of 0.01 to 0.5 w/w % to the main culture medium.

Docosahexaenoic acid-containing oil containing docosahexaenoic acid in a concentration of 40 wt. % or more of the total weight of fatty acids in the oil, and having an endothermic peak temperature determined by differential scanning calorimetry (DSC) of 15° C. or lower; a biomass including the same; and a method for producing docosahexaenoic acid-containing oil including obtaining a biomass by culturing microorganisms of the genus Aurantiochytrium capable of producing this docosahexaenoic acid-containing oil, recovering the biomass after culture, and extracting the oil from the biomass after recovery.

Docosahexaenoic acid-containing oil containing docosahexaenoic acid in a concentration of 40 wt. % or more of the total weight of fatty acids in the oil, and having an endothermic peak temperature determined by differential scanning calorimetry (DSC) of 15° C. or lower; a biomass including the same; and a method for producing docosahexaenoic acid-containing oil including obtaining a biomass by culturing microorganisms of the genus Aurantiochytrium capable of producing this docosahexaenoic acid-containing oil, recovering the biomass after culture, and extracting the oil from the biomass after recovery.