Antioxidant System of Spirulina platensis (Nordst.) Geitler under the LED Lighting of Different Spectral Compositions

摘要

Optimization of the spectral composition of photosynthetically active light sources is highly relevant in the biotechnological production of commercially valuable species of algae, particularly the blue-green algae Spirulina platensis (Nordst.) Geitler. The aim of the research was to study the functioning of the antioxidant system of S. platensis algae cultivated under LED light sources with different spectral composition. An analysis of changes of productivity, as well as chlorophyll, phycocyanin, carotenoids, tocopherols, glutathione amounts and activity of ascorbate peroxidase, catalase and glutathione reductase in the cells of S. platensis grown under LED lighting has been done. The effect of LED lighting with different spectral composition on the main components of the antioxidant system of S. platensis has been studied. Reduction of the antioxidant status of cells of the S. platensis algae cultivated under LED illumination with various combinations of red, yellow, and blue LEDs is revealed. The received data are important in the development of new sources of photosynthetically active light with modified spectral composition, since increasing the intensity of the LED light could increase the degree of photo-oxidative effects and neutralize the activation of the photosynthetic processes, adversely affecting the productivity of the algae, as well as the biochemical value of the product.