Effect of light intensity and medium culture on the growth rate, biomass production and pigments component of microalgae Cyanothece sp.

Document Type : Original Article

Authors

Offshore Water Research Center (OWRC), Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Chabahar, Iran.

Abstract

Microalgae living in salt marshes and hypersaline lagoons are among the richest and most valuable biological resources. This study aims to determine the required light intensity and the suitable culture medium for the growth and production of economically valuable pigments in hypersaline microalgae Cyanothece sp. In this experiment, the ability to grow, biomass production and the pigments contents of microalgae Cyanothece sp in three different light intensity levels (3000, 5000 and 8000 lux) and three standard culture environments (BBM, F/2 and BG11) were investigated. The results of this research showed that increasing the light intensity from 3000 to 5000 lux in three medium BBM, F/2 and BG11 have significantly increased the growth and biomass production. Light intensity and culture medium alone and also mutually showed a significant effect on the production of chlorophyll a pigments, total carotenoid, beta-carotene, phycocyanin and phycoerythrin. The highest content of chlorophyll a pigment was obtained in BG11 medium at two light intensities of 5000 and 8000 lux. While the total carotenoids and beta-carotene reached their highest levels in the light intensity of 8000 lux and F/2 medium. The amount of phycocyanin and phycoerythrin observed in BG11 and BBM culture medium were higher than F/2 and in light intensity of 5000 and 8000 higher than 3000 lux. Based on the results, the light intensity of 5000 lux and culture medium BG11 are recommended for growing Cyanothece sp.

Keywords

References

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Aquaculture Sciences
Volume 10, Issue 2
October 2022
Pages 190-201

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