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. 2018 Sep;263:555-561.
doi: 10.1016/j.biortech.2018.05.046. Epub 2018 May 12.

Effect of Nitrogen Limitation on Biochemical Composition and Photosynthetic Performance for Fed-Batch Mixotrophic Cultivation of Microalga Spirulina Platensis

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Effect of Nitrogen Limitation on Biochemical Composition and Photosynthetic Performance for Fed-Batch Mixotrophic Cultivation of Microalga Spirulina Platensis

Xiaoting Li et al. Bioresour Technol. .

Abstract

In this study, the effect of nitrogen limitation on microalgal growth, biochemical composition and photosynthetic performance was investigated in fed-batch mixotrophic cultivation of microalga Spirulina platensis, compared with that in autotrophic cultivation. The microalgal biomass productivity was greatly enhanced by mixotrophic cultivation. With nitrogen limitation, the mixotrophic culture accelerated the degradation of microalgal pigments and proteins to supply intracellular nitrogen for maintaining higher biomass productivity, simultaneously accumulating more carbohydrates. The mixotrophic cultivation amplified the adverse effect of nitrogen limitation on the microalgal photosynthetic performance in comparison with autotrophic cultivation. This fed-batch mixotrophic cultivation is an effective strategy for enhancing biomass productivity and total carbohydrates yield under nitrogen limited conditions.

Keywords: Cell components; Chlorophyll fluorescence; Microalgae; Mixotrophy; Nitrogen limitation.

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