Instituto Federal de Educação Ciência e Tecnologia da Bahia, Rodovia BR 367, s/n, Fontana 1, 45810-000 Porto Seguro, BA, Brazil.
Universidade Federal do Sul da Bahia, Centro de Formação em Ciências Ambientais, Rodovia BR 367, Km 10, s/n, 45810-000 Porto Seguro, BA, Brazil.
An Acad Bras Cienc. 2024 Aug 16;96(3):e20230348. doi: 10.1590/0001-3765202420230348. eCollection 2024.
Cyanobacterial phycocyanin and phycoerythrin are gaining commercial interest due to their nutrition and healthcare values. This research analyzed the biomass accumulation and pigment production of two strains of Leptolyngbya under different combinations of light colors and intensities. The results showed that while Leptolyngbya sp.4 B1 (B1) produced all phycobiliproteins, Leptolyngbya sp.5 F2 (F2) only had phycocyanin and allophycocyanin. Both the color of the light and its light intensity affect the biomass accumulation and phycoerythrin concentration in strain B1. Although white light at medium intensity (50 μmol m-2 s-1) causes greater biomass accumulation (1.66 ± 0.13 gDW L-1), low-intensity (25 μmol m-2 s-1) green light induces lower biomass accumulation with twice the pigment content (87.70 ± 2.46 mg gDW -1), culminating in 71% greater productivity. In contrast, for the F2 strain, light intensity positively influenced biomass and pigment accumulation, being observed 2.25 ± 0.10 gDW L-1 under white light at 100 μmol m-2 s-1 and higher phycocyanin concentration (138.38 ± 3.46 mg gDW -1) under red light at 100 μmol m-2 s-1. These findings provide insights into optimizing the growth conditions by altering the intensity and wavelength of light for future production of phycocyanin and phycoerythrin from local cyanobacteria.
蓝藻藻蓝蛋白和藻红蛋白因其营养价值和保健价值而受到商业关注。本研究分析了两种束丝藻属在不同光色和强度组合下的生物量积累和色素生产。结果表明，Leptolyngbya sp.4 B1 (B1) 产生所有藻胆蛋白，而 Leptolyngbya sp.5 F2 (F2) 仅含有藻蓝蛋白和别藻蓝蛋白。光的颜色和光强都会影响 B1 菌株的生物量积累和藻红蛋白浓度。虽然中等强度（50 μmol m-2 s-1）的白光导致更大的生物量积累（1.66 ± 0.13 gDW L-1），但低强度（25 μmol m-2 s-1）的绿光诱导较低的生物量积累，但其色素含量是前者的两倍（87.70 ± 2.46 mg gDW -1），最终生产力提高了 71%。相比之下，对于 F2 菌株，光强对生物量和色素积累有积极影响，在 100 μmol m-2 s-1 的白光下观察到 2.25 ± 0.10 gDW L-1 的生物量，在 100 μmol m-2 s-1 的红光下观察到更高的藻蓝蛋白浓度（138.38 ± 3.46 mg gDW -1）。这些发现为通过改变光的强度和波长来优化未来从本地蓝藻生产藻蓝蛋白和藻红蛋白的生长条件提供了思路。
