Non-lethal nitrate supplementation enhances photosystem II efficiency in mixotrophic microalgae towards the synthesis of proteins and lipids
| Autor: | Rachapudi Venkata Sreeharsha, Palle Ranadheer, S. Venkata Mohan, Rajesh Kona |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Chlorophyll a Environmental Engineering Photosystem II Bioengineering 010501 environmental sciences Photosynthetic efficiency 01 natural sciences chemistry.chemical_compound Nitrate 010608 biotechnology Dissolved organic carbon Microalgae Biomass Food science Photosynthesis Waste Management and Disposal Scenedesmus Plant Proteins 0105 earth and related environmental sciences Growth medium Nitrates biology Renewable Energy Sustainability and the Environment Chemistry Chlorophyll A Photosystem II Protein Complex General Medicine biology.organism_classification Lipids Mixotroph |
| Zdroj: | Bioresource Technology. 283:373-377 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2019.03.089 |
| Popis: | The current study is aimed at understanding the effect of two different concentrations of nitrate (NaNO3) i.e., 2.94 mM (1X) and 8.82 mM (3X) on the productivity of Scenedesmus sp. in terms photosynthetic efficiency, growth, biomass and protein/lipid synthesis. The experiments were conducted by growing the microalgae in mixotrophic mode with a fixed dissolved organic carbon (110 mM). Chlorophyll a fluorescence fast kinetics parameter such as FV/FM, FM/FO, Pi_Abs, TRo/RC and ABS/RC depicted an improved PSII efficiency in 3X conditions. Higher nitrate concentration in BBM medium favored better assimilation of chlorophyll pigments, carbohydrates (160 mg/g), proteins (524 mg/g) and total lipids along with higher biomass (11.4 g/L). The microalgae cell growth, biomass and biochemical composition are significantly influenced by excess nitrates supplementation in the growth medium. |
| Databáze: | OpenAIRE |
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