Changes in Lipid Metabolism during Adaptation of the Dunaliella salina Photosynthetic Apparatus to High CO<sub>2</sub>Concentration

Muradyan, E. A.; Klyachko-Gurvich, G. L.; Tsoglin, L. N.; Sergeyenko, Tatiana V; Пронина, Н. А.

doi:10.1023/b:rupp.0000011303.11957.48

Cited by 79 publications

(21 citation statements)

References 20 publications

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“…Specifically, lower CO 2 concentrations led to an increase in 22:6 (n−3) PUFA, whereas 14:0 fatty acids were found to be predominant at higher CO 2 concentrations. Along with the change in composition, increased CO 2 was also observed to increase the amount of fatty acid accumulation in Dunaliella salina [153]. Similar increase in fatty acid content and unsaturation with increase in CO 2 concentrations were reported by Tsuzuki et al [154].…”

Section: Nutrientssupporting

confidence: 69%

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

2013

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Due to significant lipid and carbohydrate production as well as other useful properties such as high production of useful biomolecular substrates (e.g., lipids) and the ability to grow using non-potable water sources, algae are being explored as a potential high-yield feedstock for biofuels production. In both natural and engineered systems, algae can be exposed to a variety of environmental conditions that affect growth rate and cellular composition. With respect to the latter, the amount of carbon fixed in lipids and carbohydrates (e.g., starch) is highly influenced by environmental factors and nutrient availability. Understanding synergistic interactions between multiple environmental variables and nutritional factors is required to develop sustainable high productivity bioalgae systems, which are essential for commercial biofuel production. This article reviews the effects of environmental factors (i.e., temperature, light and pH) and nutrient availability (e.g., carbon, nitrogen, phosphorus, potassium, and trace metals) as well as cross-interactions on the biochemical composition of algae with a special focus on carbon fixation and partitioning of carbon from a biofuels perspective.

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Section: Nutrientssupporting

confidence: 69%

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

2013

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“…Merchuk et al (1998) reported that low gas (air containing 3 % CO 2 ) flow rate had a positive effect on biomass and polysaccharide production by Porphyridium sp. Muradyan et al (2004) reported that an increase in the CO 2 concentration from 2 to 10 % for 1 day was enough to provoke an increase in the total fatty acids on dry weight basis by 30 % in the green algae Dunaliella salina (known to be susceptible to CO 2 ). Feeding microalgae with CO 2 enhance the fatty acids' elongation and desaturation.…”

Section: Resultsmentioning

confidence: 99%

“…Microalgae are photosynthetic, thus making them safer and environmentally friendly alternative source for ARA production. Furthermore, challenges, such as odor taste, in the traditional PUFA manufacturing techniques can be obviated using microalgae as raw material for PUFA production (Muradyan et al 2004). Moreover, microalgae are totally natural compared to E. coli, and they possess other beneficial properties, such as non-toxicity, and less subjected to contamination and environmental fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Enhancing total fatty acids and arachidonic acid production by the red microalgae Porphyridium purpureum

Jiao

Chang

et al. 2016

Bioresour. Bioprocess.

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Objectives: This study investigated the effect of aeration rate and light intensity on biomass production and total fatty acids (TFA) accumulation by Porphyridium purpureum. The red microalgae is also known to accumulate considerable amount of arachidonic acid (ARA). Results:In artificial seawater medium, the highest yield of TFA (473.44 mg/L) was obtained with the aeration rate of 3 L/min and light intensity of 165 µmol/m 2 s, whilst the highest yield of ARA (115.47 mg/L) was achieved with the aeration rate of 3 L/min and light intensity of 110 µmol/m 2 s. It was found that higher aeration rate led to more biomass and TFA/ARA production. However, higher light intensity could contribute to biomass accumulation, but it was adverse for TFA and ARA biosynthesis. Conclusion:By optimizing two operating factors (i.e., light intensity and aeration rate), TFA and ARA production by P. purpureum was significantly improved. This research provides a potential alternative means for producing ARA.

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“…Según reportes de otros autores, para Chlorella vulgaris el porcentaje de ácidos grasos saturados puede oscilar entre 20% -30%, mientras que los poliinsaturados (AGP) pueden oscilar del 5%-24% [40]; para cepas de Chlorella un porcentaje de AGS del 40% y 60% de AGI [40] y otros reportan 58,60% de AGS, 15% de AGM y 26,4% de AGP [41]. Al comparar los resultados obtenidos con los reportados en la literatura se puede observar que estos son similares, cabe resaltar que el porcentaje de AGP en este trabajo fue mayor que los ya reportados.…”

Section: Perfil Lipídico De La Cepa Chl2 En Condiciones De Heterotrofiaunclassified

Producción de Ácidos Grasos Poliinsaturados a partir de Biomasa Microalgal en un Cultivo Heterotrófico

Medina

Bonett

Gelvez

et al. 2017

rev.ion

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ResumenEl trabajo aquí presentado se enfocó en la producción de ácidos grasos poliinsaturados o PUFA's (por sus siglas del inglés PolyUnsaturated Fatty Acids) a partir de biomasa microalgal en un cultivo heterotrófico. Para esto, se utilizaron las algas Chlorella sp. y Scenedesmus sp., en condiciones heterotróficas, posteriormente se seleccionó la cepa con mayor productividad, se realizaron las cinéticas con ambas algas para cuantificar la concentración de biomasa, glucosa, nitrógeno y fósforo; se extrajeron los lípidos y se analizaron por cromatografía de gases. El cultivo heterotrófico se estableció en un reactor de tanque agitado de flujo continuo o CSTR (por sus siglas del inglés Continuous Stirred Tank Reactor) de 1L, con las siguientes condiciones; 28°C, 1vvm, pH 6,8 y relación C/N 12:1. Luego, se realizó el cultivo en un "Biorreactor BioFlo 115" con volumen de 10L y se determinó la productividad de los lípidos obtenidos. El perfil lipídico permitió establecer que el ácido graso obtenido en mayor cantidad en CHL2 es el ácido oleico (C 18:1) con un porcentaje igual al 28,75 del total de ácidos grasos, también se destacan la acumulación de los ácidos grasos palmitoléico (C 16:1) con 19,75%, ácido araquídico (C 20:0) con 19,37%, ácido linoleico (C 18:2) con 11,86%, ácido palmítico (C 16:0) con 7,24%, ácido linolénico (ɤ-C 18:3) con 2,61%, ácido erúcico (C 22:1) con 4,61% y ácido esteárico (C 18:0) 2,4%. Palabras clave: ácidos grasos poliinsaturados (PUFA's), bomasa microalgal, Chlorella sp., Scenedesmus sp. AbstractIn this research, we obtained Polyunsaturated Fatty Acids (PUFAs) from Microalgal Biomass in heterotrophic culture. In order to obtain these PUFA's we used Chlorella sp. and Scenedesmus sp. strains with heterotrophic conditions. Subsequently, we selected the strain with higher productivity and determined the growth kinetics and biomass, glucose, phosphorus and nitrogen yields and the lipids extracted analyzed by gas chromatography. The heterotrophic culture was established in 1L Continuos Stirred-Tank Reactor (CSTR) under specific conditions; 28°C, 1vvm, pH 6,8 and a relation C/N 12:1. Then, we performed sub-cultivation in a "Bioreactor BioFlo115" with 10L volume and made productivity analysis of lipids. Lipids profile allowed us to determine that higher Fatty Acid present in Chlorella sp. is oleic acid (C 18:1) and represented a percentage of 28,75 of total fatty acids. Also we noted the accumulation the

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Changes in Lipid Metabolism during Adaptation of the Dunaliella salina Photosynthetic Apparatus to High CO₂Concentration

Cited by 79 publications

References 20 publications

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Enhancing total fatty acids and arachidonic acid production by the red microalgae Porphyridium purpureum

Producción de Ácidos Grasos Poliinsaturados a partir de Biomasa Microalgal en un Cultivo Heterotrófico

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Changes in Lipid Metabolism during Adaptation of the Dunaliella salina Photosynthetic Apparatus to High CO2Concentration

Cited by 79 publications

References 20 publications

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Enhancing total fatty acids and arachidonic acid production by the red microalgae Porphyridium purpureum

Producción de Ácidos Grasos Poliinsaturados a partir de Biomasa Microalgal en un Cultivo Heterotrófico

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Changes in Lipid Metabolism during Adaptation of the Dunaliella salina Photosynthetic Apparatus to High CO₂Concentration