Abstract
Effects of solar ultraviolet radiation (UVR) on Spirulina platensis were studied by investigating its photochemical efficiency, photosyntehetic pigments and biomass production while exposed to full spectrum solar radiation or depleted of UVR for understanding how and to what extent UVR influences its photosynthetic physiology and production. It was found that UVR brought about an extra inhibition of photochemical efficiency by 26%—30%. The greatest inhibition of photochemcial efficiency in S. plantensis was observed at noontime, and the recovered to some extent in late afernoon no matter which treatment they were exposed to. The contents of cholrophyll a, phycocyanin and carotenoids increased during initial stage of the exposure, but decreased with elongated exposure. UVR decreased the biomass yield by about 6%. It indicated that filtering out UVR of solar radiation would raise the productivity of S. plantensis, which is an important factor that should be considered in the production.
∗Supported by Hainan DIC Microalagae Co. Ltd. and National Natural Science Foundation of China (Gran No. 30070582)
Notes
∗Supported by Hainan DIC Microalagae Co. Ltd. and National Natural Science Foundation of China (Gran No. 30070582)
