Dipartimento di Scienze delle Produzioni Agroalimentari e dell'Ambiente-Sezione di Microbiologia Agraria, Università degli Studi di Firenze, Piazzale delle Cascine 24, 50144, Firenze, Italy.
Biotechnol Bioeng. 2014 May;111(5):956-64. doi: 10.1002/bit.25014. Epub 2013 Aug 27.
The effect of light quality on cell size and cell cycle, growth rate, productivity, photosynthetic efficiency and biomass composition of the marine prasinophyte Tetraselmis suecica F&M-M33 grown in 2-L flat panel photobioreactors illuminated with light emitting diodes (LEDs) of different colors was investigated. Biomass productivity and photosynthetic efficiency were comparable between white and red light, while under blue and green light productivity decreased to less than half and photosynthetic efficiency to about one third. Differences in cell size and number correlated with the cell cycle phase. Under red light cells were smaller and more motile. Chlorophyll content was strongly reduced with red and enhanced with blue light, while carotenoids and gross biomass composition were not affected by light quality. The eicosapentaenoic acid content increased under red light. Red light can substitute white light without affecting productivity of T. suecica F&M-M33, leading to smaller and more motile cells and increased eicosapentaenoic acid content. Red LEDs can thus be profitably used for the production of this microalga for aquaculture.
研究了不同颜色发光二极管（LED）照明的 2-L 平板光生物反应器中海洋甲藻 Tetraselmis suecica F&M-M33 的细胞大小和细胞周期、生长速率、生产力、光合效率和生物量组成受光质的影响。在白光和红光下，生物量生产力和光合效率相当，而在蓝光和绿光下，生产力下降到不到一半，光合效率下降到约三分之一。细胞大小和数量的差异与细胞周期阶段相关。在红光下，细胞更小且更具运动性。叶绿素含量随红光而强烈降低，随蓝光而增强，而类胡萝卜素和总生物量组成不受光质影响。二十碳五烯酸含量在红光下增加。红光可以替代白光而不影响 T. suecica F&M-M33 的生产力，导致更小且更具运动性的细胞和增加的二十碳五烯酸含量。因此，红色 LED 可有利地用于水产养殖中这种微藻的生产。
