Barnett Jonathan Z, Foy Jacob, Malone Ronald, Rusch Kelly A, Gutierrez-Wing Maria Teresa
Department of Civil and Environmental Engineering Louisiana State University Baton Rouge LA USA.
Office for Research and Creative Activity North Dakota State University Fargo ND USA.
Eng Life Sci. 2017 Feb 28;17(6):678-685. doi: 10.1002/elsc.201600013. eCollection 2017 Jun.
Light effect on cultures of microalgae has been studied mainly on single species cultures. Cyanobacteria have photosynthetic pigments that can capture photons of wavelengths not available to chlorophylls. A native Louisiana microalgae () and cyanobacteria ( sp.) co-culture was used to study the effects of light quality (blue-467 nm, green-522 nm, red-640 nm and white-narrow peak at 450 nm and a broad range with a peak at 550 nm) at two irradiance levels (80 and 400 μmol m s) on the growth, species composition, biomass productivity, lipid content and chlorophyll-a production. The co-culture shifted from a microalgae dominant culture to a cyanobacteria culture at 80 μmol m s. The highest growth for the cyanobacteria was observed at 80 μmol μmol m s and for the microalgae at 400 μmol m s. Red light at 400 μmol m s had the highest growth rate (0.41 d), biomass (913 mg L) and biomass productivity (95 mg L d). Lipid content was similar between all light colors. Green light had the highest chlorophyll-a content (1649 μg/L). These results can be used to control the species composition of mixed cultures while maintaining their productivity.
对微藻培养物的光照影响主要是在单一物种培养物上进行研究的。蓝细菌具有光合色素，能够捕获叶绿素无法利用的波长的光子。使用路易斯安那州本地的一种微藻（）和蓝细菌（种）共培养物，研究了两种辐照度水平（80和400 μmol m² s⁻¹）下光质（蓝光 - 467 nm、绿光 - 522 nm、红光 - 640 nm和白光 - 450 nm处窄峰以及550 nm处宽峰）对生长、物种组成、生物量生产力、脂质含量和叶绿素a产量的影响。在80 μmol m² s⁻¹时，共培养物从以微藻为主的培养物转变为蓝细菌培养物。蓝细菌在80 μmol m² s⁻¹时生长最高，微藻在400 μmol m² s⁻¹时生长最高。400 μmol m² s⁻¹的红光具有最高的生长速率（0.41 d⁻¹）、生物量（913 mg/L）和生物量生产力（95 mg L⁻¹ d⁻¹）。所有光色下的脂质含量相似。绿光具有最高的叶绿素a含量（1649 μg/L）。这些结果可用于控制混合培养物的物种组成，同时保持其生产力。
