State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Bioresour Technol. 2014 Sep;167:276-83. doi: 10.1016/j.biortech.2014.06.030. Epub 2014 Jun 14.
Haematococcus pluvialis is the best source of natural astaxanthin known as "the king of antioxidants". The mass outdoor culture is the most workable strategy for astaxanthin production, but the effects of daytime and night temperatures on the biomass concentration and astaxanthin content of H. pluvialis have received little attention. This study indicated that, raising the daytime or night temperature could stimulate night accumulation of astaxanthin until temperature up to 28°C; the night biomass loss increased firstly and then decreased along with the daytime temperature reducing; decreasing the night temperature can lessen night biomass loss; the daytime temperature of 28°C and the night temperature below 28°C were optimal for achieving high biomass and astaxanthin content. Subsequently, the outdoor culture strategy has been improved and can increase the net biomass and astaxanthin productivities by 5 and 2.9-fold as compared to the former strategy.
雨生红球藻是天然虾青素的最佳来源，被誉为“抗氧化之王”。大规模的户外培养是生产虾青素最可行的策略，但白天和夜间温度对雨生红球藻生物量浓度和虾青素含量的影响却很少受到关注。本研究表明，提高白天或夜间温度可以刺激虾青素在夜间积累，直至温度达到 28°C；随着白天温度的降低，夜间生物量损失先增加后减少；降低夜间温度可以减少夜间生物量损失；白天温度为 28°C，夜间温度低于 28°C 是实现高生物量和虾青素含量的最佳条件。随后，改进了户外培养策略，与以前的策略相比，可使净生物量和虾青素生产力分别提高 5 倍和 2.9 倍。
