Detection of Bioactive Compound from Microscopic Blue-Green Algae Gloeocapsopsis Crepidinum under the Effect of Different Light Intensities

Bioactive compounds are a component of secondary metabolism found in blue-green algae, green and red algae Rhodophyta and many other algae, which are used in many medical, industrial and agricultural applications. In general, the production of active compounds by blue-green algae depends on many factors of environmental conditions, especially light during the cultivation period. This study aimed to demonstrate the production of vitamins, proteins, phenols and other vital substances under the effect of different light intensities on the growth rate and maintaining optimal lighting by the blue-green algae Gloeocapsopsis crepidinum. the algae G. crepidinum was studied, under the effect of two different light intensities from a light-emitting diode, 50 and 70 micro mols, Photons/m2/s which were used in the laboratory. The study recorded the growth rate per day at a light intensity of 50 micromol. Photon/m2/s, and growth rate at a light intensity of 70 micromoles. photons/m2/s and the optimum illumination was set at 50 micromol. Photon/m2/s to detect the production of vitamins, proteins, phenols and other vital substances in the studied algae. the production of vitamins, proteins, phenols and other vital substances in the algae G. crepidinum recorded high concentrations after fixing the light at an average light intensity of 50 micromols. photons/m2/s, as vitamin (C) concentration, reached 1.77 milligrams/gram, vitamin (E) concentration reached 2.404 milligrams/gram, proteins reached 29%, phenols concentration reached 3.55 milligrams/gram, tannins recorded a value of 0.72 mg/g, and alkaloids recorded a value of 0.1002 mg/s. grams, while flavinoids reached 0.42 milligrams/gram, sugars reached 21.5%, and Fats were 24 mg/g, while the concentration of carotenoids was 0.87 μg/g. These results give a good impression that the production of vitamins, proteins, phenols and other vital substances from the algae G. crepidinum under moderate lighting conditions increases the growth rate and production of active bioactive compounds, but high light intensity prevents it. The results of the statistical analysis also showed that there were statistically significant differences between the light intensities used in the study at the p < 0.05 level.