Effect of nitrogen stress and temperature on the yield of some fatty acids Lyngbya algae

Abstract

Microalgae are an alternative source of food, animal feed, biofuel, fertilizer, cosmetics, nutraceuticals, and pharmaceutical products. Growth rates of the microalgae, biomass output, and nutritional value as measured by the generation of lipid and fatty acids all have an impact on the extraction of organic components from microalgae grown in various nutrient compositions. Investigation on the significance of temperature and nitrogen, both of which are essential for algae growth, has been conducted. This study attempts to emphasize the temperature and nitrogen level needed for locally isolated microalgae (Lyngbya sp).and focuses on the benefits of nitrogen and the effect of temperature for increasing biomass productivity of Lyngbya sp for improved lipid and fatty acid quantities. Locally isolated microalgae showed variation in the degree of response  The effect of high temperatures (40)° for unsaturated fatty acids was the opposite of saturated fatty acids, as the highest concentrations of unsaturated fatty acids were recorded at temperature (20)° for each of(Docosatetraenoic acid, Oleic acid, Octadecatrienoic acid) and completely opposite for saturated fatty acids, which was recorded at temperature (40)° for each of (Tetradecanoic acid ,Pentadecanoic acid, Hexadecanoic acid),  According to the quality of the fatty acids produced inside it as a result of a change when adding nitrogen from the nutrient medium, the medium recorded an increase in the rates of all saturated fatty acids at a concentration of 20, while unsaturated fatty acids recorded a decrease when nitrogen was added. in natural hosts (control),that can be used to utilize lipid and fatty acids from microalgae for biofuel and pharmaceutical, food supplements purposes